ÖZET KİTABI

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ÖZET KİTABI

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DESTEKLEYEN KURULUŞLAR

İstanbul Üniversitesi

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ÖNSÖZ

İlki 8-9 Şubat 2018 tarihlerinde İstanbul Üniversitesi Fen Fakültesi Fizik Bölümü’nde

düzenlenecek olan “Yüksek Enerji Fiziği, Astrofizik ve Kozmoloji Çalıştayı-2018” ülkemizin

en seçkin fizikçileri ve yurt dışından seçkin konuk bilim insanlarının katılımı ile

gerçekleştirilecektir.

Çalıştayın amacı yüksek enerji fiziği, astrofizik ve kozmoloji gibi görece farklı fakat önemli

ölçüde bağlaşık alanları ortak bir perspektifte buluşturmak ve bu perspektif üzerinden güncel

kuramsal ve deneysel sonuçları tartışmaktır.

Ekrem Aydıner

YEFAK Bilimsel Yürütme ve Düzenleme Kurulu Adına

İstanbul Üniversitesi Fizik Bölümü

Yüksek Enerji ve Plazma Fiziği Anabilim Dalı

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YEFAK Bilimsel Yürütme Kurulu:

Durmuş Ali Demir, İzmir Yüksek Teknoloji Enstitüsü

Ekrem Aydıner, İstanbul Üniversitesi

Ersin Göğüş, Sabancı Üniversitesi

Metin Arik, Boğaziçi Üniversitesi

Osman Teoman Turgut, Boğaziçi Üniversitesi

Ömer Faruk Dayı, İstanbul Teknik Üniversitesi

Tekin Dereli, Koç Üniversitesi

YEFAK-2018 Düzenleme Kurulu:

Alper Dizdar, İstanbul Üniversitesi

Ayşe Ulubay, İstanbul Üniversitesi

Aytül Adıgüzel, İstanbul Üniversitesi

Değer Sofuoğlu, İstanbul Üniversitesi

Ekrem Aydıner, İstanbul Üniversitesi (Düzenleme Kurulu Başkanı)

Ertan Güdekli, İstanbul Üniversitesi

Fatma Aydoğmuş Şen, İstanbul Üniversitesi

Ferhat Nutku, İstanbul Üniversitesi

Gülistan Çiğdem Yalçın, İstanbul Üniversitesi

Osman Teoman Turgut, Boğaziçi Üniversitesi

Özgür Ökcü, İstanbul Üniversitesi

** Liste alfabetik sıra izlenerek düzenlenmiştir.

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Konuşmacılar / Speakers:

Alexander Zhuk, Mechnikov National University

Cosmic screening of the gravitational interaction

Ali Mostafazadeh, Koç Üniversitesi

Dynamical formulation of scattering theory and new exactly solvable scattering potentials in two-

dimensions

Altan Çakır, İstanbul Teknik Üniversitesi

Probing Physics Beyond the Standard Model with Precision: Big Data and Machine Learning

Durmuş Ali Demir, İzmir Yüksek Teknoloji Enstitüsü

Symmergent Gravity and Ultraviolet Stability

Ekrem Aydıner, İstanbul Üniversitesi

Kaotik Evren Modeli

Emre Onur Kahya, İstanbul Teknik Üniversitesi

Nötron Yıldızı Birleşiminin Öğrettikleri: Karanlık Madde Var!

Ersin Göğüş, Sabanci Üniversitesi

Yüksek magnetik alana sahip nötron yıldızları

İbrahim Semiz, Boğaziçi Üniversitesi

Kozmolojik süpernova verileri gercekte bize ne söylüyor?

Kai Oliver Schwenzer, İstanbul Üniversitesi

Probing the neutron star interior with gravitational waves from binary mergers

Kalidas Sen, University of Hyderabad

Critical screening in the one-and two-electron Yukawa atoms

Kazım Yavuz Ekşi, İstanbul Teknik Üniversitesi

Are there intermediate-mass black holes in the Universe?

Metin Arik, Boğaziçi Üniversitesi

Brans-Dicke-Jordan teorisinde ilkel enflasyon ve karanlık enerji

Muhammed Deniz, Dokuz Eylül Üniversitesi

Neutrinos as a Probe to New Physics Beyond the Standard Model

Murat Hüdaverdi, Yıldız Teknik Üniversitesi

Eliptik galaksilerde karanlık Madde İzleri

Osman Teoman Turgut, Boğaziçi Üniversitesi

Ground state structure of singular systems

Ömer Faruk Dayı, İstanbul Teknik Üniversitesi

Semiclassical Chiral Kinetic Theory in Rotating Coordinates

Özgür Akarsu, İstanbul Teknik Üniversitesi

Cosmology and astrophysics in energy-momentum powered gravity

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Konuşmacılar / Speakers:

Tekin Dereli, Koç Üniversitesi

Gravitasyon Dalgalari ve Enerji-Momentum Korunumu

Tolga Güver, İstanbul Üniversitesi

Nötron Yıldızlarının Astrofiziksel Gözlemleri

Yamaç Pehlivan Deliduman, Mimar Sinan Üniversitesi

Süpernova nötrinoları ve nükleer sentezlenme

** Konuşmacı listesi alfabetik sıra izlenerek düzenlenmiştir.

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PROGRAM

8 Şubat 2018 Perşembe / 8 February 2018 Thursday

08:00 Tanışma - Giriş kartlarının dağıtımı

09:00 Açılış / Opening : Ekrem Aydıner

BİRİNCİ OTURUM / FIRST SESSION

Oturum Başkanı / Chairman : Ersin Göğüş

09:10 Alexander Zhuk, Mechnikov National University

Cosmic screening of the gravitational interaction

09:50 Kazım Yavuz Ekşi, İstanbul Teknik Üniversitesi

Are there intermediate-mass black holes in the Universe?

10:30 Çay-Kahve Arası / Tea-Coffee Break

10:50 Kalidas Sen, University of Hyderabad

Critical screening in the one-and two-electron Yukawa atoms

11:30 Altan Çakır, İstanbul Teknik Üniversitesi

Probing Physics Beyond the Standard Model with Precision: Big Data and Machine Learning

12:10 Ali Mostafazadeh, Koç Üniversitesi

Dynamical formulation of scattering theory and new exactly solvable scattering potentials in two-

dimensions

12:50 Öğle Yemeği / Lunch

İKİNCİ OTURUM / SECOND SESSION

Oturum Başkanı / Chairman : Tekin Dereli

14:10 Durmuş Ali Demir, İzmir Yüksek Teknoloji Enstitüsü

Symmergent Gravity and Ultraviolet Stability

14:50 Kai Oliver Schwenzer, İstanbul Üniversitesi

Probing the neutron star interior with gravitational waves from binary mergers

15:30 Ekrem Aydıner, İstanbul Üniversitesi

Kaotik Evren Modeli

16:00 Poster Sunumları

16:10 Çay-Kahve Arası / Tea-Coffee Break

16:30 Ömer Faruk Dayı, İstanbul Teknik Üniversitesi

Semiclassical Chiral Kinetic Theory in Rotating Coordinates

17:10 Osman Teoman Turgut, Boğaziçi Üniversitesi

Ground state structure of singular systems

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9 Şubat 2018 Cuma / 9 February 2018 Friday

ÜÇÜNCÜ OTURUM / THIRD SESSION

Oturum Başkanı / Chairman : Durmuş Ali Demir

09:00 Muhammed Deniz, Dokuz Eylül Üniversitesi

Neutrinos as a Probe to New Physics Beyond the Standard Model

09:40 İbrahim Semiz, Boğaziçi Üniversitesi

Kozmolojik süpernova verileri gercekte bize ne söylüyor?

10:20 Çay-Kahve Arası / Tea-Coffee Break

10:40 Tolga Güver, İstanbul Üniversitesi

Nötron Yıldızlarının Astrofiziksel Gözlemleri

11:20 Özgür Akarsu, İstanbul Teknik Üniversitesi

Cosmology and astrophysics in energy-momentum powered gravity

12:00 Emre Onur Kahya, İstanbul Teknik Üniversitesi

Nötron Yıldızı Birleşiminin Öğrettikleri: Karanlık Madde Var!

12:40 Öğle Yemeği / Lunch

DÖRDÜNCÜ OTURUM / FOURTH SESSION

Oturum Başkanı / Chairman : Ömer Faruk Dayı

14:00 Tekin Dereli, Koç Üniversitesi

Gravitasyon Dalgalari ve Enerji-Momentum Korunumu

14:40 Ersin Göğüş, Sabanci Üniversitesi

Yüksek magnetik alana sahip nötron yıldızları

15:20 Yamaç Pehlivan Deliduman, Mimar Sinan Üniversitesi

Süpernova nötrinoları ve nükleer sentezlenme

16:00 Çay-Kahve Arası / Tea-Coffee Break

16:20 Metin Arik - Medine İldeş, Boğaziçi Üniversitesi

Brans-Dicke-Jordan teorisinde ilkel enflasyon ve karanlık enerji

17:00 Murat Hüdaverdi, Yıldız Teknik Üniversitesi

Eliptik galaksilerde karanlık Madde İzleri

17:40 Kapanış / Closing: Tekin Dereli

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ÖZETLER / ABSTRACTS

SÖZLÜ SUNUMLAR / ORAL PRESENTATIONS

** Sözlü sunumlar listesi alfabetik isim sırası izlenerek düzenlenmiştir.

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Alexander I. Zhuk

Short Biography:

Alexander I. Zhuk is a Principal Scientist at the Research Institute “Astronomical Observatory” of the Odessa

I.I. Mechnikov National University. After graduating from the Moscow Engineering Physical Institute in 1977,

he gained his PhD degree in 1983 from the Moscow P.N.Lebedev Physical Institute of the Academy of

Sciences of USSR and a HubilitationDoctoral degree in 1999 from the N.N. Bogolyubov Institute for

Theoretical Physics of the National Academy of Sciences of Ukraine. He worked at the Department of

Theoretical Physics of the Odessa I.I. Mechnikov National University from 1982-2007. For one year (1987)

he was a visiting scientist at the Cambridge University where he worked under the supervision of Prof. Steven

Hawking. He was also a visiting scientists in many leading international scientific institutions (CERN

(Switzerland), Free University (Germany), Albert-Einstein-Institute (Germany), University of Minnesota

(USA), Princeton University (USA), Columbia University (USA), Tufts University (USA), Fermi National

Accelerator Laboratory (USA), IMFF, CSIC (Spain), etc.). From 2003-2008 and from 2009-2014, he was

elected as a Senior Associate at the Abdus Salam International Center for Theoretical Physics, Trieste (Italy).

His research interests have included high energy physics, theories of gravity, multidimensional cosmological

and gravitational models, structure of the Universe at large and small scales, dark matter and dark energy. He

has published more than 100 peer-reviewed papers in the leading International physical journals. He has

(co)organized more than 10 International conferences and was a (co)editor of the conference Proceedings

published e.g. in Cambridge Scientific Publishers and in American Institute of Physics.

Talk Title: Cosmic screening of the gravitational interaction

Abstract: Cosmic structures (e.g. galaxies, group and clusters of galaxies) are formed due to gravitational

interaction. In the weak field approximation this interaction is defined by the gravitational potential. In

General Relativity, the equation for the gravitational potential is determined by the theory of perturbations.

We performed a careful analysis of the linearized Einstein equations demonstrated that the gravitational

potential of an inhomogeneity (e.g. galaxy) at cosmological scales satisfies the Helmholtz type equation, rather

than the Poisson equation. Therefore, it has the Yukawa potential form. The reason for this screening is the

collective effect of the cosmological background. The screening scale is time dependent and is of the order of

3700 Mpc at the present time. At small distances from an inhomogeneity, the potential has the Newtonian

limit. Our approach works at all cosmological scales and incorporates linear and nonlinear effects with respect

to energy density fluctuations.

Selected Publications:

Günther U., Starobinsky A., Zhuk A. Multidimensional cosmological models: cosmological and astrophysical

implications and constraints. Physical Review D69 (2004) 044003 [12 pages], (hep-ph/0306191).

Chopovsky A., Eingorn M., Zhuk A. Problematic aspects of Kaluza-Klein excitations in multidimensional

models with Einstein internal spaces. Physics Letters, B 736 (2014) p.329-332, (arXiv:1402.1340).

Eingorn M., Kiefer C., Zhuk A. Scalar and vector perturbations in a universe with discrete and continuous

matter sources. Journal of Cosmology and Astroparticle Physics, 09 (2016) 032 [19 pages], (arXiv:1607.03394

[gr-qc]).

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Ali Mostafazadeh

Biographical Info:

Ali Mostafazadeh was born in 1965 in Tabriz, Iran. He received his BS degrees in physics and mathematics

from Boğaziçi University in 1989 and his Ph.D. in physics from the University of Texas at Austin in 1994. He

held a Killam Postdoctoral position at the University of Alberta before joining Koç University in 1997. He is

the author of over 130 research publications, an elected principal member of the Turkish Academy of Sciences

since 2007, member of the Science Academy Association since 2013, and a recipient of TÜBİTAK Science

Award (2007).

Research Areas: Geometric and topological aspects of quantum mechanics, supersymmetry and its

generalizations, quantum cosmology, non-Hermitian operators, mathematical optics, and scattering theory.

Sample Publications:

A. Mostafazadeh “Pseudo-Hermiticity versus PT-Symmetry: The necessary condition for the reality of the

spectrum of a non-Hermitian Hamiltonian,” J. Math. Phys. 43, 205-214 (2002).

A. Mostafazadeh “Spectral Singularities of Complex Scattering Potentials and Infinite Reflection and

Transmission Coefficients at real Energies,” Phys. Rev. Lett., 102, 220402 (2009).

F. Loran and A. Mostafazadeh “Perfect Broad-Band Invisibility in Isotropic Media with Gain and Loss,” Opt.

Lett. 42, 5250-5253 (2017).

Title of the talk: Dynamical formulation of scattering theory and new exactly solvable scattering

potentials in two-dimensions

Abstract: The discovery of new exactly solvable scattering potentials is a rare event in the history of quantum

physics. In this talk we report such a discovery. Specifically, we introduce two classes of scattering potentials

in two dimensions whose scattering amplitude admits an exact and closed-form expression in terms of classical

functions. The basic tool that has made this possible is a recently developed dynamical formulation of

scattering theory [1,2,3]. The first of these classes consists of delta-function potentials in two dimensions

whose support is a subset of a line [4]. It includes finite linear arrays of delta-function potentials in two

dimensions, as well as delta-function potentials supported on a line and having an arbitrary periodic spatial

dependence along this line. An example is a periodic infinite linear array of two-dimensional delta-functions.

The second class contains complex potentials whose support is an infinite strip in the x-y plane [5]. They have

a specific periodic y-dependence and an essentially arbitrary x-dependence. These potentials model certain

active optical slab systems. We discuss their possible applications in generating quantum states with entangled

momentum along one direction and quantized momentum along the other. Our results also suggest means for

devising directional and multimode lasers.

The only prerequisite for this talk is a working knowledge of standard nonrelativistic quantum scattering theory

at the level of Sakurai.

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References:

[1] F. Loran and A. M., arXiv:1511.01404 [Phys. Rev. A 93, 042707 (2016)]

[2] F. Loran and A. M., arXiv:1605.01225 [Proc. R. Soc. A 472, 20160250 (2016)]

[3] F. Loran and A. M., arXiv:1705.00500 [Opt. Lett. 42, 5250-5253 (2017)]

[4] F. Loran and A. M., arXiv:1708.06003

[5] F. Loran and A. M., arXiv:1711.01132 [Phys. Rev. A 96, 063837 (2017)]

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Altan Çakır

Short Biography:

Altan Çakır received his M.Sc. degree in theoretical particle physics from Izmir Institute of Technology in

2006 and then went straight as a to graduate school at the Karlsruhe Institute of Technology, Germany, from

which he earned a Ph.D. in experimental high energy and particle physics in 2010. During his Ph.D., he was

responsible for a scientific research based on new physics searches in the CMS detector at the Large Hadron

Collider (LHC) at European Nuclear Research Laboratory (CERN). Thereafter he was granted as a post-

doctoral research fellow at Deutsches Elektronen-Synchotron (DESY), a national nuclear research center in

Hamburg, Germany where he spent 5 years, and then recently got his present faculty position at Istanbul

Technical University (ITU) in Istanbul, Turkey. Currently, Altan Çakır is a deputy of ITU-CMS group at

CERN and leading a data analysis group searching for new physics at the CMS experiment. In addition, he

was a visiting faculty at Fermi National Accelerator Laboratory (Fermilab) for polarization measurement of

top quark pairs for beyond the Standard Model physics at the CMS experiment in 2017. His group’s expertise

is focused around machine learning techniques in data analysis and detector development. However, their

research is very much interdisciplinary, with expertise in the group ranging from particle physics, detector

development and data analysis synthesis to economy and industrial applications.

Altan Çakır involved a large number of high profile research projects at CERN, DESY and Fermilab last

thirteen years. He enjoys being able to integrate his research and teaching key concepts of particle physics and

data analysis. It’s rewarding to be part of the development of the next generation of physicist, and help his

students move on to careers all over the world, in academia, industry and government.

Talk Title: Probing Physics Beyond the Standard Model with Precision: Big Data and Machine

Learning

Abstract: CERN is known as the scientific research organization which operates the Large Hadron Collider

(LHC) – the largest experiment ever undertaken, which targets to explain mysteries behind the creation of the

universe. The experiment data is primarily collected through light sensors – which are basically cameras,

although ones capable of taking pictures at 100 megapixel resolution, and quick enough to capture events

taking place on a sub-atomic scale. Numerous breakthroughs, including the recent Higgs particle discovery,

have been made which have increased our understanding of how and why the universe works. None of this

would have been possible if it wasn’t for CERN’s commitment to innovating in the field of Big Data and

Machine Learning techniques. In this talk the impact of those innovations, measurements and applications will

be discussed for beyond the Standard Models searches and how they proceed via precision measurements.

Selected Publications:

“Search for top-squark pair production in the single lepton final state in pp collisions at √s = 8 TeV”, CMS

Collaboration, Eur. Phys. J. C 73 (2013) 2677, arXiv: 1308.1586.

“Search for SUSY in Final States with Single Leptons, B-Jets and Missing Transverse Energy in pp Collisions

at √s = 7 TeV”, CMS Collaboration, Phys. Rev. D 87, 052006.

“Non-Simplified SUSY: stau-Coannihilation at the LHC and ILC”, A. Cakir, M. Berggren, D. Kruecker, I.

Melzer-Pellmann, C. Seitz, S. Wayand, 10.1140/epjc/s10052-016-3914-2.

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Durmuş Ali Demir

Özgeçmiş:

Durmuş Demir, 1991 yılında ODTÜ Elektrik-Elektronik Mühendisliği Bölümü’nden mezun oldu. Aynı

zamanda ODTÜ Fizik Bölümü’nde yan dal programını tamamladı. Akabinde, 1993 yılında Yüksek Lisans,

1995 yılında ise Doktora derecesini ODTÜ Fizik Bölümü’den aldı. İzleyen yıllarda, Pennsylvania Üniversitesi

(Philadelphia,ABD), ICTP (Trieste, İtalya) ve Teorik Fizik Enstitüsü (Minnesota, ABD)’de doktora sonrası

araştırma faaliyetleri yürüttü. 2003 yılından bu yana İzmir Yüksek Teknoloji Enstitüsü, Fizik Bölümü’nde

görev yapmaktadır.

Durmuş Demir, Dünya Bilimler Akademisi (TWAS) ve Bilim Akademisi-İstanbul üyesidir. Alexander von

Humboldt Vakfı, Friedrich Wilhelm Bessel Araştırma Ödülü sahibidir. Ayrıca, TÜBİTAK teşvik, M. N. Parlar

araştırma ve Sedat Simavi fen ödüllerinin sahibidir. LHEP Dergisi editörlerindendir.

İlgi Alanları: Parçacık Fiziği ve Kuantum Fiziği

Talk Title: Symmergent Gravity and Ultraviolet Stability

Abstract: All experiments and observations seem to prefer the Standard Model (SM) of elementary particles

along with cold dark matter and the cosmological constant. However, having no dark matter candidate and

suffering from destabilizing UV sensitivities, the SM fails to account for the existing data.

The talk is about this very problem. It will be shown that actually theoretical setup and the experimental data

show good agreement if gravity emerges through the effective SM in a way restoring the gauge symmetries

broken by the UV cutoff. This symmetry-driven emergent gravity, symmergent gravity, in short, yields the

Einstein gravity with no higher-curvature terms and necessitates a crowded hidden sector, which can

accommodate the dark matter and the dark energy. Symmergent gravity reveals that the LHC and other

colliders do not have to discover any new particles but in case they do their findings must exhibit specific

patterns. The hidden sector is expected to be known more precisely once it is put on work for reducing the

cosmological constant from the neutrino scale down to the Hubble scale.

Selected Publications:

D. Demir, T. Güner, Statistical Approach to Tunneling Time in Attosecond Experiments, Annals of Physics

386 (2017) 291 [arXiv:1512.04338].

H. Azri, D. Demir, Affine Inflation, Phys. Rev. D95 (2017) 124007 [arXiv:1705.05822].

D. Demir, Curvature-Restored Gauge Invariance and Ultraviolet Naturalness, Adv. High Energy Phys. 2016

(2016) 6727805 [arXiv:1605.00377].

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Ekrem Aydıner

Kısa Özgeçmiş:

Ekrem Aydıner, çocukluğundan beri ve halen doğayı, yani bütünsel anlamda evreni, anlamak ve

kavramsallaştırmak için uğraşı içindedir. Ankara Üniversitesi Fen Fakültesi Fizik Bölümünde fizik okudu.

Çukurova Üniversitesi, Dokuz Eylül Üniversitesi Fizik Bölümlerinde ve Feza Gürsey Enstitüsünde araştırmacı

ve öğretim üyesi statülerinde çalıştı. 2009 yılından beri İstanbul Üniversitesi Fizik Bölümünde öğretim

üyesidir.

İlgi ve Çalışma Alanları: Kozmoloji, kaotik sistemler, faz geçişleri ve kritik olaylar, dengeden uzak sistemler,

kompleks sistemler, parçacık fiziği, kuantum informasyon teorisi ve felsefe.

Konuşma Başlığı: Kaotik Evren Modeli

Özet: Evrenin oluşumu, formasyonu, yapısı, dinamikleri ve evrimini anlama çabası her zaman güncel bir konu

olmuştur. 1917’de Einstein ile başlayan modern kozmoloji tarihinde Einstein’in evren modeli ve onu takip

eden birçok ilginç evren modeli önerilmiştir. Bu modellerin arasında Big-Bang (büyük patlama) modeli en

çok kabul gören model olmuştur. Bu model, kozmik mikrodalga arka planı ve Hubble gözlemleriyle keşfedilen

kozmik kırmızıya kaymanın yanı sıra hafif elementlerin bolluğunu teyit eden gözlemler ile desteklenmiştir.

Fakat Big-Bang modeli gerçek anlamda evrenin varlığı, dinamiği ve evrimini açıklayamadığı gibi kozmik

tekillik, büyük yırtılma, büyük çökme, kozmik karşılaşma, galaksilerin ortaya çıkışı, evrendeki maddenin

fraktal dağılımı, evrenin büyük ölçekli organizasyonu, uzay zamanın yapısı vb gibi önemli problemlerede

yanıt verememektedir. Bu konuşmada evren dinamiği ve evrimini daha gerçekçi bir şekilde temsil eden ve

yukarıdaki soruları yanıtlayabilen “Kaotik Evren Modeli” tanıtılacaktır. Kaotik Evren Modeli bilinen

modellerin yerine yeni bir kozmoloji perspektifi sunduğu gibi parçacık fiziği senaryolarını yeniden

düşünmemizi zorlayacak niteliktedir. (Ekrem Aydıner, Chaotic Universe Model, Scientific Reports 8 Article

number: 721 (2018) Doi:10.1038/s41598-017-18681-4).

Seçilmiş Yayınlar:

Ekrem Aydıner, Chaotic Universe Model, Scientific Reports 8 Article number: 721 (2018).

Doi:10.1038/s41598-017-18681-4

Özgür Ökcü and Ekrem Aydıner, Joule–Thomson expansion of the charged AdS black holes, Eur. Phys. J. C

(2017) 77: 24. https://doi.org/10.1140/epjc/s10052-017-4598-y

Ekrem Aydiner, Andrey G. Cherstvy and Ralf Metzler, Wealth distribution, Pareto law, and stretched

exponential decay of money: Computer simulations analysis of agent-based models, Physica A Vol: 490,

p.278-288 (2018). https://doi.org/10.1016/j.physa.2017.08.017

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Emre Onur Kahya

Kısa Özgeçmiş:

26 Ekim 1978 yılında Ankara’da doğan Emre Onur Kâhya, 1996 yılında Ankara Atatürk Anadolu Lisesi’nden,

2000 yılında Ortadoğu Teknik Üniversitesi Fizik Bölümü’nden mezun oldu. 2002 yılında ODTÜ’de yüksek

lisans yaptıktan sonra, Florida Üniversitesi’nde kuramsal yüksek enerji fiziği ve kozmoloji alanında 2008

yılında doktorasını tamamladı. 2008 yılında Koç Üniversitesi’nde bir yıl araştırmalarına devam ettikten sonra,

2009 yılından 2012 yılına kadar Max Planck Enstitüsü – Jena’da doktora sonrası çalışmalarını sürdürdü. 2012

yılından itibaren İstanbul Teknik Üniversitesin’de akademik çalışmalarına devam etmektedir.

Emre Onur Kâhya’nın 800’ün üzerinde atıf alan akademik çalışmaları, 2009’da Marie Curie International

Reintegration Grant (IRG) hibesiyle de desteklendi. Emre Onur Kâhya, 2015’te Türkiye Bilimler Akademisi

Üstün Başarılı Genç Bilim İnsanı Ödülü’ne (TÜBA-GEBİP), 2016 yılında Bilim Kahramanları Derneği

tarafından Üstün Başarılı Genç Bilim İnsanı Ödülü’ne, 2016 yılında Tübitak Teşvik Ödülü’ne ve son olarak

2017 yılında Mustafa Parlar Vakfı Araştırma TeşvikÖdülü’ne layık görüldü.

Çalışma Alanları: Evrenbilim (kozmoloji), kuantum yerçekimi (kuantum gravitasyon), Einstein teorilerinin

modifikasyonu ve gravitasyon dalgaları

Konuşma Başlığı: Nötron Yıldızı Birleşiminin Öğrettikleri: Karanlık Madde Var!

Özet: “2017 yılında, nötron yıldızı çifti birleşimi sonucunda oluşan, gravitasyon dalgaları ve gamma ışığını

gözlemledik. Yaptığımız çalışma ile, bu gözlemin zorunlu bir sonucu olarak, karanlık maddenin var olması

gerekliliğini gösterdik.”

Seçilmiş Yayınları:

Boran, S. Desai, E.O. Kahya and R.P. Woodard, “GW170817 Falsifies Dark Matter Emulators”,

arXiv:1710.06168.

Emre O. Kahya and Shantanu Desai, “Constraints on frequency-dependent violations of Shapiro delay from

GW150914”, arXiv:1602.04779.

Sibel Boran and E.O. Kahya, “Loop Corrections to Primordial Non-Gaussianity”, arXiv:1601.01106.

18

Ersin Göğüş

Kısa Özgeçmiş:

Ersin Göğüş, lisans ve yüksek lisans derecesini Orta Doğu Teknik Üniversitesi Fizik Bölümünden aldıktan

sonra, NASA’nın Marshall Uzay ve Havacılık Merkezi’nde yürüttüğü araştırmalarla doktora derecesini 2002

yılında almıştır. 2002 – 2005 yılları arasında dönüşümlü olarak Ulusal Uzay Bilimleri ve Teknolojileri Merkezi

(Huntsville, ABD) ve Sabancı Üniversitesi’nde doktora sonrası araştırmalarını sürdüren Ersin Göğüş, 2005

yılından bu yana Sabancı Üniversitesi Mühendislik ve Doğa Bilimleri Fakültesi’nde öğretim üyesi olarak

görev yapmaktadır. 2007 yılında doçentlik, 2012 yılında ise profesörlük unvanını almıştır. 2004 yılında

Türkiye Bilimler Akademisi (TÜBA) tarafından “Seçkin Genç Bilimci Ödülü”ne layık görülmüş ve 2004 –

2007 yılları arası TÜBA – GEBİP bursu almaya hak kazanmıştır. Temel bilimler alanında 2008 TÜBİTAK

Teşvik Ödülü’nü, 2012 yılında FABED Eser Tümen Üstün Başarı Ödülünü almıştır. Bilim Akademisi asli

üyesidir. Ersin Göğüş’ün hakemli dergilerde yayınlanmış 96 bilimsel makalesi, editörlüğünü yaptığı bir

konferans bildiri kitabı bulunmaktadır. Bilimsel araştırmalarını tanıttığı makaleleri çeşitli popüler bilim

dergilerinde yayınlanmıştır.

Ersin Göğüş yüksek enerji astrofiziği alanında, nötron yıldızları ve gama ışını patlamaları konularında

araştırmalar sürdürmektedir. Son yıllarda Türkiye’de yüksek enerji astrofiziği konularında çeşitli uluslararası

konferans ve çalıştayların düzenlenmesinde önemli katkılarda bulunmuştur. Bilimsel araştırmalarının yanı

sıra, temel bilimin yaygınlaştırılması ve astronominin temel eğitimde daha yaygın ve etkin kullanımına yönelik

eğitim programları gerçekleştirmektedir.

Konuşma Başlığı: Yüksek magnetik alana sahip nötron yıldızları

Özet: Nötron yıldızları, süpernova patlamalarından geriye kalan olası ürünlerinden biri ve yoz nötron basıncı

ile kendi kütlesine karşı koyabilen, dengede kalabilen sistemler. Nötron yıldızları maddenin gözlenebilen en

yoğun halindeler. Bu sistemler aynı zamanda şiddetli manyetik alana sahipler; genç bir nötron yıldızının

manyetik alanı 108 T mertebesinde. Küçük bir sınıf nötron yıldızı sergiledikleri çok yüksek enerjili X-ışını

patlamaları ile diğerlerinden ayrışıyor. Saniyenin onda biri kadar kısa sürede Güneş’in binlerce yılda

yayabileceğine eşdeğer enerji yayabilen bu patlamaların, daha şiddetli manyetik alanlarının (1010 – 1011 T)

etkisi ile mümkün olduğu düşünülüyor. Bu bağlamda, manyetarlar olarak adlandırılan nötron yıldızları,

maddenin en yüksek manyetik alanlarının etkisinde olduğu ortamları barındırıyor. Bu konuşmada,

manyetarların genel özellikleri ve ayırt edici özelliği olan kısa ve uzun süreli patlamaları tanıtılacak, özellikle

son yirmi yılda elde edilen patlama ve sürekli X-ışıması verileri ışığında manyetar araştırmalarında gelinen

nokta paylaşılacaktır.

Seçilmiş Yayınlar:

Göğüş, E., ve ark. (2017) Burst and Outburst Characteristics of Magnetar 4U 0142+61. Astrophysical Journal,

835, 68.

Kırmızıbayrak, D, Şaşmaz Muş, S, Kaneko, Y, Göğüş, E. (2017) Broadband Spectral Investigations of

Magnetar Bursts. Astrophysical Journal Supplements, 232, 17.

Göğüş, E., ve ark. (2016) Magnetar-like X-Ray Bursts from a Rotation-powered Pulsar, PSR J1119-6127.

Astrophysical Journal Let., 829, L25.

19

İbrahim Semiz

Kısa Özgeçmiş:

Prof. Dr. İbrahim Semiz lisans eğitimini 1982-1986 arasında Boğaziçi Fizik Bölümü’nde tamamladı. 1992’de

ABD’de Yale Üniversitesi’nde kara delikler üzerine yazdığı tez ile doktora derecesi aldı. 1992-1994 arası

ABD’de University of North Carolina – Chapel Hill’de Fizik Bölümü’nde doktora sonrası araştırma, 1994-

1997 arası KKTC’de Doğu Akdeniz Üniversitesi’nde öğretim üyeliği yaptı. 1997’den beri Boğaziçi

Üniversitesi Fizik Bölümü’nde öğretim üyeliği yapmakta, “50 Soruda Görelilik Kuramları” adlı popüler

seviyede bir kitabı bulunmaktadır.

Çalışma ve ilgi alanları: Genel Görelilik (Kara delikler ve Kozmoloji)

Short Biography:

Professor İbrahim Semiz received his undergraduate degree at Boğaziçi University Department of Physics

(1982-86). He received his PhD Degree at Yale University with a dissertation on black holes. He was a

postdoctoral research fellow at the Department of Physics of the University of North Carolina at Chapel Hill

during 1992-1994, and taught at Eastern Mediterranean University in the Republic of Northern Cyprus during

1994-1997. He has been teaching at Boğaziçi University, Department of Physics since 1997, and is the author

of a popular book on relativity.

Research interests: General Relativity (Black holes and Cosmology)

Konuşma Başlığı: Kozmolojik süpernova gözlemleri bize gerçekte neler söylüyor?

Özet: Tek başına pek birşey söylemediği anlaşılıyor…

Geçen yüzyılın sonunda, tip Ia süpernova (SN) gözlemleri ile, evrenin genleşmesinin ivmelenmekte olduğu

anlaşıldı. Bu veriler standart olarak Genel Görelilik (GR) kuramıyla değerlendirilir ve evrendeki maddenin

çoğunun karanlık olduğu, ama evrende maddeden daha güçlü etkiye sahip bir de kozmolojik sabit benzeri

karanlık enerjinin varlığı sonucuna varılır.

Ancak, karanlık madde ve enerji kavramları, GR’nin daha iyi bir kuram ile değiştirilmesi gereğine de işaret

ediyor olabilir. Bu konuyu incelemek amacıyla, evrenin genleşme geçmişini süpernova verilerinden, yalnızca

genelçekimin uzay-zaman geometrisinden (GR denklemleri şart değil) kaynaklandığı ve evrenin tektürel

(homojen) ve eşyönlü (izotropik) olduğu varsayımlarıyla çıkarmayı denedik (“modelden bağımsız” ya da

“kozmoğrafya” yaklaşımı). Sonuçların düzensizliği ve parametrizasyon bağımlılıkları sebebiyle bu yaklaşımın

güvenilir sonuç vermediğini bulduk.

Ancak, gama ışını patlamaları (GRB) verilerini de kullanarak, çalışmanın “modelden bağımsız”lığından biraz

taviz pahasına, düzensizlikleri terbiye edebildik ve evrenin hangi kızılakayma parametresi değerinde

yavaşlamadan ivmelenmeye geçiş yaptığını, uzayın eğriliği cinsinden belirleyebildik.

Eğer GR’yi de varsayarsak, evrenin yoğunluğunun eğrilikten bağımsız olduğu bir kızılakayma değeri

buluyoruz. Bunu kullanarak, günümüzdeki madde miktarına üst sınır, dolayısıyla, karanlık enerji miktarına alt

20

sınır bulduk. Bunlar, genel kabul gören sınırları iyileştirmese de, yalnız SN ve GRB verileriyle, yani karanlık

enerjinin özellikleri ile ilgili varsayım yapılmadan bulunmuş olma özelliğine sahiptirler.

Abstract: Not much by themselves, apparently.

At the end of last century, analysis of type Ia supernova (SN) data revealed that the expansion of the universe

is accelerating. The common interpretation of the data assumes that Einstein gravity (GR) is correct, leading

to a universe dominated by matter (some of it dark) plus a cosmological constant-like dark energy.

However, additions of the concepts of dark matter and dark energy to the paradigm could be pointing to the

necessity of replacing GR by a better theory. In this work, we try to determine the expansion history of the

universe from the SN data, using only the homogeneity and isotropy of the universe and the assumption that

gravitation is due to the geometry of the universe, not necessarily obeying Einstein’s Equations (“model-

independent,” or “cosmographic” approach). We find that the acceleration history of the universe cannot be

reliably determined in this approach due to the irregularity and parametrization-dependence of the results.

However, adding the gamma-ray-burst (GRB) data to the dataset cures most of the irregularities, at the cost of

compromising the model-independent nature of the study slightly. Then we can determine the redshift of

transition to cosmic acceleration as function of the spatial curvature of the universe.

If GR is assumed, we find a redshift at which the density of the universe is independent of curvature. We use

this to derive an upper limit on matter density today, hence a lower limit on the density of dark energy. While

these limits do not improve the generally accepted ones, they are derived only using the SN and GRB data,

i.e. without making any assumptions about the properties of dark energy.

Seçilmiş Yayınlar:

Weak cosmic censorship, superradiance, and quantum particle creation (with K. Düztaş), Phys. Rev. D, v92,

104021 (2015).

Black hole as the ultimate energy source, Am.J.Phys. v63, 151 (1995).

ICVS: A Paradigm to Address Urban Traffic Gridlock and Associated Problems, IEEE Intell. Transp. Syst.

Mag., v8, 43 (2016).

21

Kai Oliver Schwenzer

Short Biography:

Kai Schwenzer got his Graduate Degree and his PhD in Theoretical Nuclear and Particle Physics from the

University of Heidelberg (Germany). After positions at North Carolina Stare University (USA), the University

of Graz (Austria), Washington University in St. Louis (USA) and the University of Tübingen (Germany), he

is since 2016 at the Department of Astronomy and Space Sciences at Istanbul University.

Research Interests: Strong Interaction Physics and Confinement, Dense Matter, Compact Star Astrophysics,

Gravitational Waves

Talk Title: Probing the neutron star interior with gravitational waves from binary mergers

Abstract: The recent observation of the first neutron star merger, both across the electromagnetic spectrum

and in gravitational waves, heralds the era of gravitational wave astronomy. Inferring the properties of dense

matter is one of the most exciting applications of this emerging area of science. We show that the material

properties of dense matter can have a significant impact on the post-merger evolution and correspondingly the

resulting gravitational wave signal from binary neutron star mergers. Future gravitational wave data should,

therefore, help us to reveal what compact stars are made of.

Selected Publications:

M. G. Alford, L. Bovard, M. Hanauske, L. Rezzolla and K. Schwenzer, “Viscous dissipation and heat

conduction in binary neutron-star mergers”, Phys. Rev. Lett. in press (the article that my talk is based on, sorry

that I don’t know the detailed journal number, yet).

K. Kokkotas and K. Schwenzer, “R-mode astronomy”, Eur. Phys. J. A 52 (2016) 38.

M. G. Alford and K. Schwenzer, “What the timing of millisecond pulsars can teach us about their interior”,

Phys. Rev. Lett. 113 (2014) 251102.

22

Kalidas Sen

Short Biography:

Kalidas Sen F.A.Sc., F.N.A obtained PhD from IIT-Kanpur in 1977 under guidance of Professor

P.T.Narasimhan and subsequently joined University of Hyderabad where he continues to teach and carry out

research as a professor emeritus and C.S.I.R. Emeritus Scientist, in the School of Chemistry. His research in

electronic structure theory have led to the publication of 9 monographs and just over 200 research papers in

prestigious international journals. A recipient of Humboldt, Commonwealth, Fulbright, J.S.P.S. and NSERC

Canada Research Fellowship. He was awarded the DAAD Research Professorship, Indo-US Professorship of

Physics of the American Physical Society, Visiting Fellowship of the Office of Naval Research Laboratory,

Washington. He has extensively collaborated with fellow scientists from Belgium, Cameroon, Canada, Chile,

China, Israel, Germany, Greece, Hungary, Japan, Mexico, Nigeria, Russia, Spain, Turkey, USA. He has been

a J.C. Bose National Fellow till June 2016. He is currently a visiting scientist at Department of Physics,

Istanbul University supported by TUBITAK, Ankara, under its program 2221. His current research interests

include applications of information theory, and quantum confinement effects in electronıc structure of atoms

and molecules.

Research interests: Dr. Sen’s current research interests include applications of information theory, and

quantum confinement effects in electronıc structure of atoms and molecules.

Talk Title: Critical screening in the one- and two-electron Yukawa atoms#

H. E. Montgomery Jr.1 K. D. Sen2* Jacob Katriel3

Abstract: The one- and two-electron Yukawa atom, also referred to as the Debye-Hückel or screened

Coulomb atom, has been the topic of considerable interest both for intrinsic reasons and because of its

relevance to terrestrial and astrophysical plasmas. At sufficiently high screening the one-electron Yukawa

atom ceases to be bound. Some calculations appeared to suggest that as the screening increases in the ground

state of the two-electron Yukawa atom (in which both the one-particle attraction and the inter-particle

repulsion are screened) the two electrons are detached simultaneously, at the same screening constant at which

the one-electron atom becomes unbound. Our results rule this scenario out, offering an alternative that is not

less interesting. In particular, it is found that for Z ≤∼ 1.000 a mild amount of screening actually increases the

binding energy of the second electron. At the nuclear charge Z c ≈ 0.911028.., at which the pure Coulomb

two-electron atom becomes unbound, and even over a range of lower nuclear charges, an appropriate amount

of screening gives rise to a bound two-electron system.

# In press in Physical Review A. 1 Chemistry Program, Centre College, Danville, Kentucky 40422, USA, 2 School of Chemistry, University of Hyderabad, Hyderabad-500 046, India, 3 Department of Chemistry,

Technion – Israel Institute of Technology, Haifa, 32000 Israel, * e-mail: kalidas.sen@gmail.com

Selected Publications:

Electronic Structure of Quantum Confined Atoms and Molecules, [Ed. K.D.Sen Springer, UK , 2014].

Statistical Complexity: Applications in Electronic Structure, [Ed. K.D.Sen Springer, UK , 2011].

Reviews in modern quantum chemistry: A celebration of the contribution of Robert G. Parr, Vol I-II, [Ed.

K.D.Sen World Scientific Publishing Company, Singapore, 2002] .

23

Kazim Yavuz Ekşi

Short Biography:

Kazım Yavuz Ekşi was born in 1972 in İstanbul.. For his undergraduate he studied electrical engineering at

İstanbul Technical University. He obtained his MS degree (1999) and PhD (2003) in physics at Boğaziçi

University. He then worked in Sabanci University and Harvard-Smithsonian Center for Astrophysics as a post-

doctoral fellow. Since 2006 he works at the Applied Physics Department of İstanbul Technical University.

Research Interests: Research interests of Kazım Yavuz Ekşi are high energy astrophysical studies of compact

objects, specifically neutron stars. He studies the accretion modes of neutron stars in binary systems, the

diversity of young isolated neutron stars, structure of neutron stars in alternative/modified theories of gravity.

Talk Title: Are there intermediate mass black holes in the Universe?

Abstract: Black hole candidates in the galaxy are accreting black holes in binary systems formed by stellar

evolution and have masses in the range of 5-20 solar masses. All galaxies are expected to have a supermassive

black hole in the range of ~10^6-10^9 solar masses at their center. Since 2000’s intermediate mass black holes

(IMBH) were associated with ultra-luminous X-ray sources (ULXs), the off-central sources with isotropic

luminosities exceeding the Eddington limit of a ~100 solar mass object. In 2014 one of these sources were

discovered to show X-ray pulsations clearly indicating that the accreting object is a neutron star rather than a

black hole. Since then two more pulsating ultraluminous X-ray sources (PULX) were discovered evidencing

that neutron stars are common among the ULX population. The talk will introduce our efforts for

understanding how a neutron star can shine with a luminosity three orders of magnitude greater than their

Eddington limit and argue for the possibilty that all ULX population are stellar mass objects either neutron

stars or stellar mass black holes.

Selected Publications:

Ekşi, K. Y.; Andaç, İ. C.; Çıkıntoğlu, S.; Gençali, A. A.; Güngör, C.; Öztekin, F., “The ultraluminous X-ray

source NuSTAR J095551+6940.8: a magnetar in a high-mass X-ray binary”, Monthly Notices of the Royal

Astronomical Society: Letters, Volume 448, Issue 1, p.L40-L42, DOI: 10.1093/mnrasl/slu199

Ekşi, Kazım Yavuz; Güngör, Can; Türkoǧlu, Murat Metehan, “What does a measurement of mass and/or

radius of a neutron star constrain: Equation of state or gravity?”, Physical Review D, Volume 89, Issue 6,

id.063003, DOI:10.1103/PhysRevD.89.063003

Arapoǧlu, Savaş; Deliduman, Cemsinan; Ekşi, K. Yavuz, “Constraints on perturbative f(R) gravity via neutron

stars”, Journal of Cosmology and Astroparticle Physics, Issue 07, id. 020 (2011). DOI: 10.1088/1475-

7516/2011/07/020

24

Metin Arık

Short Biography:

Metin Arık graduated from Istanbul University Faculty of Science in 1969 with a diploma degree in Physics

with minors in Mathematics. He received his MS (1970) and PhD (1974) from University of Pittsburgh. His

research interests exemplified by over a hundred research articles cover a wide spectrum including High

Energy Theory and Experiment, Mathematical Physics, and Cosmology. He was a research associate at Ohio

State University (1974), Brookhaven National Laboratory (1974-1976) and University of London (1976-

1979). He is currently Professor of Physics at Boğaziçi University where he started as Assistant Professor in

1979. For the period 1986-1992 he was Professor of Applied Mathematics at Istanbul Technical University.

He is a member of Turkish Academy of Sciences, has served as President of Turkish Physical Society (1996-

2000), President of Balkan Physical Union (2006-2009) and holds a Doctor Honoris Causa degree from

Ovidius University.

Çalışma ve İlgi Alanları: Yüksek enerji fiziği, Kozmoloji, Matematiksel Fizik.

Konuşma Başlığı: Brans-Dicke-Jordan teorisinde ilkel enflasyon ve karanlık enerji

Özet: Brans-Dicke-Jordan teorisini hem kozmolojinin karanlık enerji ve ilkel enflasyon problemleri açısından

hem de kuantum alan teorisi ile genel görelilik arasındaki uçurumu kapamak açısından irdeleyeceğiz. Teorinin

değişik yorumlarını ve değişik klasik çözümlerini gözden geçireceğiz. Etkileşimleri uzun menzilli olan,

tabiatın üç ana bozonu Foton, Higgs bozonu ve Graviton hakkında bir yorum getirmeye çalışacağız.

Selected Publications:

M Arık and M C Çalık, Primordial and late-time inflation in Brans–Dicke cosmology, JCAP, 01 (2005) 013.

Ö. Akarsu, M. Arık, N. Katırcı and M. Kavuk, Accelerated expansion of the universe à la the Stueckelberg

mechanism, JCAP (2014) 009.

Metin Arık and Mikhail B. Sheftel, Symmetry analysis and exact solutions of modified Brans-Dicke

cosmological equations, Phys. Rev. D. 78, 064067 (2008).

25

Muhammed Deniz

Short Biography:

Muhammed Deniz secured his BS, M.Sc. and Ph.D. degrees in Physics from Middle East Technical University

(METU), Ankara, Turkey. His Ph.D. thesis was conducted with the collaboration of METU and Academia

Sinica, Taipei, Taiwan in 2007. Throughout his graduate study, he developed his theoretical background by

taking some particle physics courses and enriched his knowledge in the field of Neutrino Physics. In 1999 he

was at CERN, Geneva, Switzerland as a visiting research scholar and completed his master thesis in the

following year. He studied one of the very important characteristic properties of neutrinos called oscillation

phenomena and completed some background understanding analysis in the CHORUS Experiment. During his

Ph.D. study he joined “Taiwan Experiment On Neutrino (TEXONO)” Collaboration group in 2004 as a full

time researcher to do research on Neutrino Physics and Dark Matter. In his Ph.D. study, he performed

measurement of neutrino-electron scattering cross section, thereby weak-mixing parameters and Weinberg

angle.

He has got two terms post-doctoral position for four years in TEXONO Collaboration after his graduation in

Ph.D. He has been in DOSAP program instructor position at Department of Physics, METU during 2007-2010

period performing the collaboration duties of METU in TEXONO group. He is currently working as a

Professor at Department of Physics, Dokuz Eylul University. He has been head of Turkish group in TEXONO

Collaboration since 2011. After a long term partnerships and working in many common projects, he has

become a collaboration member of “China Dark Matter Experiment (CDEX)” Collaboration running at China

JinPing Laboratory (CJPL) in China since 2017, which is the deepest underground laboratory in the world. He

is the Turkish representative and board member of the “Large Enriched Germanium Experiment for

Neutrinoless ↑↑ Decay (LEGEND)” Collaboration which has been formed recently by united of MAJORANA

and GERDA Experiments to study Neutrinoless Double Beta Decay.

His main research interests are Neutrino Physics, phenomenological and experimental studies in the Standard

Model (SM) and Beyond (BSM), non standard interaction (NSI) in neutrino-electon and neutrino-nucleus

coherent scattering interaction channels; measurement of neutrino electromagnetic properties such as neutrino

magnetic moment and neutrino charge radius; as well as experimental Dark Matter searches.

Talk Title: Neutrinos as a Probe to New Physics Beyond the Standard Model

Abstract: Neutrino electron scattering is a purely leptonic fundamental interaction and therefore provides an

important channel to test Standard Model especially at the low energy-momentum transfer regime. Constraints

on neutrino non-standard interactions (NSI) couplings depending on model independent approaches, which

are described by a four-Fermi point like interaction, are derived. The upper limits and the allowed regions of

vectorial, scalar, pseudo-scalar and tensorial NSI couplings of neutrinos are derived at 90% confidence level

in both one-parameter and two-parameter analysis. In addition, constraints on couplings of several Beyond

Standard Model (BSM) physics scenarios are placed via neutrino electron scattering channel to test Standard

Model at low energy-momentum transfer regime which are mediated by massive intermediate particles which

include: (1) Extra Z-prime, (2) New Light Spin-1 Boson, (3) Dark Photon, and (4) Charged Higgs Boson.

Bounds to coupling constants of Flavor Conserving and Flavor Violation New Light Spin-1 Boson, Dark

Photon, and Charged Higgs Boson with respect to different mass of mediators are placed. The relevant

parameter spaces are extended by allowing light mediators. New lower mass limits for extra Z-prime gauge

26

boson models are placed. Data on neutrino and anti-neutrino electron scattering from the TEXONO and LSND

experiments, respectively, are used.

Keywords— Standard Model and Beyond, Neutrino, Non-Standard Interaction of Neutrino (NSI).

Selected Publications:

“Constraints on Non-Standard Intermediate Boson Exchange Models from Neutrino-Electron Scattering”, B.

Sevda, A. Şen, M. Demirci M. Deniz, et al., Phys. Rev. D 96, 035017 (2017).

“Constraints on Scalar-Pseudoscalar and Tensorial Non-Standard Interaction and Tensorial Unparticle

Couplings from Neutrino-Electron Scattering”, M. Deniz*, et al., Phys. Rev. D 95, 033008 (2017).

“Constraints on nonstandard neutrino interactions and unparticle physics with ν̅e-e- scattering at the Kuo-

Sheng nuclear power reactor”, M. Deniz et al., Phys. Rev. D 82, 033004 (2010).

“Measurement of Neutrino-Electron Scattering Cross-Section with a CsI(Tl) Scintillating Crystal Detector

Array at the Kuo-Sheng Nuclear Power Reactor”, M. Deniz et al., Phys. Rev. D 81, 072001 (2010).

27

Murat Hüdaverdi

Short Biography:

Murat HÜDAVERDİ is a graduated from Bogazici University, Physics Department. He had his MSc from

Nagoya University Physics Department (2003) and got his PhD from Nagoya University, Particle and

Astrophysical Sciences (2006), Japan. After graduation he was postdoctoral Scientist in Ecotopia Science

Center – Japan for 1 year, and postdoctoral fellow at Bogazici University for 2 years. He worked as Space

Radiation Researcher at TUBITAK Space Institute for 5 years. He was COSPAR National Representative for

2011-2014. He is in Yildiz Technical University, Physics Department at present.

His research interests are large-scale structures of the Universe, galaxy clusters, cosmology, dark matter, space

radiation and radiation shielding.

Konuşma Başlığı: Eliptik galaksilerde karanlık Madde izleri

Selected Publications:

Caglar, Turgay; Hudaverdi, Murat, “Dynamical history of a binary cluster: Abell 3653” 2017, MNRAS

Volume 471, Issue 4, p.4990-5007.

Caglar, Turgay; Hudaverdi, Murat, “XMM-Newton view of X-ray overdensities from nearby galaxy clusters:

the environmental dependencies” 2017, MNRAS, Volume 472, Issue 3, p.2633-2642.

Bozkurt, Mustafa; Ergin, Tulun; Ercan, Nihal; Hudaverdi, Murat, “High Energy Studies on the Non-Thermal

Emissions from Cassiopeia A & Tycho” International Journal of Astronomy and Astrophysics, vol. 3, issue

01, pp. 34-48.

28

Osman Teoman Turgut

Short Biography:

After graduating from double major program in EE and Physics, he has completed his PhD under the

supervision of S. G. Rajeev from University of Rochester, NY at 1996. He became a postdoctoral fellow of

EPDI and spent one year at IHES, Bures-sur-Yvette and one year at Cambridge University. He spent 6 months

at Mittag-Leffler Institute, as a postdoctoral researcher in QFT program, following this he became a Gustafsson

postdoctoral researcher at KTH, Stockholm for one year and joined the Physics Department of Bogazici

University. Currently, he is a professor at this department. He has been a visiting scientist at SISSA,

Department of Mathematics of KTH, Carnegie-Mellon University, Doppler Institute, Prague.

Research Areas: Teoman Turgut’s research is centered around mathematical problems of physical interest.

Primarily, he has been working on problems related to gauge theories and simple quantum field theory models.

One of the major problems of theoretical physics is to understand the dynamics of gauge theories, through the

underlying geometric structure as well as the divergences inherent to quantum field theories.

Talk Title: Ground state structure of singular systems

Abstract: Ground state of a finite quantum system is expected to be unique under relatively mild conditions,

yet this is not so obvious when we deal with singularities. One of the simplest such problems is the delta

function supported potentials. We discuss that these problems have unique ground state configurations. When

we deal with infinite degrees of freedom this question becomes much more subtle, one such very simple system

is a version of the Lee model, for which a static two level source couples to a field. We show that this system

has a unique ground state.

Selected Publications:

S. G. Rajeev ve O. T. Turgut, “Geometric Quantization of Two Dimensional QCD”, Comm. Math. Phys. Vol.

192 (1998) 493.

F. Erman, O. T. Turgut, “Point interactions in two and three dimensional Riemannian manifolds”, J. Phys A:

mathematical and theoretical Vol 43 (2010) article no: 335204.

L. Akant, E. Ertugrul, F. Tapramaz, O. T. Turgut, “BEC condensation on a manifold with nonnegative Ricci

curvature”, Journal of Math. Phys. Vol. 56 (2015) article no: 013509.

29

Ömer Faruk Dayı

Short Biography:

He graduated from Physics Engineering Department of Ankara University in 1981. He received Ph.D. degree

in 1987 from International School of Advanced Studies, Trieste, Italy. He worked as a postdoctoral researcher

in International Center of Theoretical Physics, Trieste and in Kaiserslautern University, Germany as a

Humboldt fellow. He was a researcher in Institute of Basic Sciences, TUBITAK, Istanbul from 1993-97. Then

he became a member of Physics Engineering Department of Istanbul Technical University where he still

teaches. He published more than 50 research papers. He honored with Science Award of Sedat Simavi

Foundation in 1993.

Research Interest: Quantization of constrained Hamiltonian systems. Noncommutative theories. Quantum Hall

effect: Anomalous and spin. Kinetic theory of Dirac and Weyl particles.

Talk Title: Semiclassical Chiral Kinetic Theory in Rotating Coordinates

Abstract: The semiclassical kinetic theory of Weyl particles in the presence of external electromagnetic fields

and global rotation is established in terms of a spin two-form. The anomalous chiral effects due to the external

electromagnetic fields and angular velocity of the frame are calculated. The nonlinear transport features of

inhomogeneous chiral plasma are briefly discussed.

Selected Publications:

Ö.F. Dayi and A. Jellal, Hall Effect in Noncommutative Coordinates, J. Math. Phys. 43 (2002) 4592; arXiv:

hep-th/0111267.

Ö F. Dayi and M. Elbistan, A Semiclassical Formulation of the Chiral Magnetic Effect and Chiral Anomaly

in Even d+1 Dimensions, Int. J. Mod. Phys. A 31 (2016) 1650074; arXiv:1402.4727.

Ö. F. Dayi, E. Kilincarslan and E. Yunt, Semiclassical dynamics of Dirac and Weyl particles in rotating

coordinates, Phys. Rev. D 95, 085005 (2017); arXiv:1605.05451.

30

Özgür Akarsu

Short Biography:

Özgür Akarsu received his BSc degree as the first runner up in 2003 from the Dept. of Astronomy and Space

Sciences at Ege University. He received his MSc degree in 2005 and PhD degree in 2010 in Astrophysics from

the same university. He studied at the Dept. of Applied Mathematics and Theoretical Physics (DAMTP) at

Cambridge University in England as a visiting PhD student/researcher in 2008-2009 education year. He was

elected for the Post-Doctorate Research Programme by the Turkish Academy of Sciences (TÜBA) and started

to work at the Dept. of Physics at Koc University with Prof. Tekin Dereli in 2010. He is an associate professor

at the Dept. of Physics Engineering at Istanbul Technical University (ITU) since 2015. He regularly carries

out researches at The Abdus Salam International Centre for Theoretical Physics (ICTP) in Italy as a visiting

scientist. He was one of the winners of the distinguished Young Scientist Awards (BAGEP) of the Science

Academy in 2016.

Research Interests: Cosmology, general relativity, modified gravities, higher dimensions, dark energy, string

cosmology, inflation, observational cosmology, cosmological parameter estimation.

Talk Title: Cosmology and astrophysics in energy-momentum powered gravity

Abstract: In this talk a new type of modified theory for gravitation we recently proposed, called energy-

momentum powered gravity (EMPG), will be discussed with its theoretical and observational aspects in the

cosmological and astrophysical contexts. We will discuss that EMPG leads to the late-time acceleration of the

Universe with pressureless matter only, while keeping the successes of standard general relativity at early

times. We will show in the light of observational data that it describes an evolution of the Universe similar to

that in the ΛCDM model, but yet alleviates the cosmological constant problem. We will finalise the talk by

some comments on that EMPG can be unified with Starobinsky gravity to describe the complete history of the

Universe including the inflationary era and studying EMPG in the context of primordial nucleosynthesis, and

compact astrophysics objects such as neutron stars. (Ö. Akarsu, N. Katırcı and S. Kumar, Cosmic acceleration

in dust only Universe via energy-momentum powered gravity, Phys. Rev. D 97, 024011 (2018)

[arXiv:1709.02367])

Selected Publications:

Ö. Akarsu, A. Chopovsky and A. Zhuk, Black branes and black strings in the astrophysical and cosmological

context, Phys. Lett. B. (2018) 10.1016/j.physletb.2018.01.022 [arXiv:1711.08372].

Ö. Akarsu, N. Katırcı and S. Kumar, Cosmic acceleration in dust only Universe via energy-momentum

powered gravity, Phys. Rev. D 97, 024011 (2018) [arXiv:1709.02367].

M. Adak, Ö. Akarsu, T. Dereli and Ö. Sert, Anisotropic inflation with a non-minimally coupled

electromagnetic field to gravity, JCAP 17, 026 (2017) [arXiv:1611.03393].

31

Tekin Dereli

Short Biography:

Tekin Dereli received his B.S. and Ph.D. degrees in Physics from the Middle East Technical University

(METU) in Ankara. He taught as Professor at METU and Ankara University until 2001. Since then he is a

full-time faculty member at Koç University. Tekin Dereli held longterm visiting research positions at various

times at Yale University, Brandeis University, University of Vienna (Austria), Karlsruhe University

(Germany) and Lancaster University (England). He received the TUBITAK Science Prize (1996),

Prof.Mustafa Parlar Foundation Science Prize (1993) and the Sedat Simavi Foundation Science Prize (1989).

He is a life-long Member of the Turkish Academy of Sciences since 1994. Research interests of Tekin Dereli

include i) non-Abelian quantum gauge fields, ii) supersymmetry and supergravity, iii) gravitational waves and

black holes in generalized theories of gravity and iv) higher dimensional cosmological models. He has written

150 papers in top physics and mathematics journals. He also published two books in Turkish.

Talk Title: Gravitational Waves and Energy-Momentum Quanta

Abstract: Conserved electromagnetic currents associated with space-time isometries will be discussed first in

order to draw analogies between the photon and graviton concepts. Then a variational construction of a

symmetric, second rank covariant gravitational stress-energy-momentum tensor will be given which is nothing

but a contraction of the third rank Bel-Robinson tensor. These ideas are going to be illustrated in plane fronted

gravitational wave space-times that carry helicity-2 polarised graviton states with non-zero energy and

momentum. (T. Dereli and R. W. Tucker, Class. Q. Grav. 21 (2004) 1459)

Some of his most recent papers:

M. Adak, O. Akarsu, T. Dereli, O. Sert, Anisotropic Inflation With A Nonminimally Coupled Electromagnetic

Field To Gravity, JCAP, 11 (2017) 026 (arXiv:1611.03393[gr-qc]).

A. Baykal, T. Dereli, Linearised Gravity In Terms Of Differential Forms, Europ. Phys. J. Plus, 132 (2017) 52

(arXiv:1612.05510[gr-qc]).

T. Dereli, C. Yetişmişoğlu, New Improved Massive Gravity And Three Dimensional Spacetimes Of Constant

Curvature And Constant Torsion, Phys. Rev. D 94, 064067 (2016) (arXiv:1604.00463 [gr-qc]).

http://home.ku.edu.tr/~tdereli/

32

Tolga Güver

Short Biography:

Tolga Guver started his career in Istanbul University Astronomy and Space Department. He worked on X-ray

observations of low mass X-ray binaries and cataclysmic variable as well as optical observations of afterglows

of gamma-ray bursts during his masters thesis. During his phd, he worked on atmosphere models for highly

magnetized neutron stars and their application to X-ray data, together with Feryal Ozel as his secondary

advisor. During this time he spent three months in University of Amsterdam Anton Pannekoek Institute as a

fellow of Astrophysics of Neutron Stars EU Marie Curie program and 4 months at the University of Arizona

Physics Department. After completing his phd in 2008 Tolga Guver moved to University of Arizona Physics

Department as a postdoctoral fellow. In 2009 He moved to Steward Observatory at the same university as a

research associate and worked on thermonuclear X-ray bursts and neutron star mass-radius measurements

using X-ray spectroscopy. In 2011 after wining a TUBITAK Fellowship he returned to Turkey Sabanci

University and spent two years working X-ray observations of neutron stars. in 2013 he moved to Istanbul

University Astronomy and Space Sciences Department. He has been a technical committee member for the

TUBITAK National Observatory for the last 15 years, the director of Istanbul University Observatory

Research and Application Center since 2016 a member of the Science Working Group for NASA’s Neutron

Star Interior and Composition Explorer mission and the principal investigator of the Istanbul University part

of the Easter Anatolia Observatory Focal Plane Instrumentation Project of the ministry of development of the

Turkish Republic. He has been an author of 68 refereed articles, which were cited more than 1800 times.

Talk Title: Nötron Yıldızlarının Astrofiziksel Gözlemleri

Abstract: Neutron stars are extreme objects in the Universe that were formed after the collapse of a massive

star. They are thought to have a mass that is 1.4 times the mass of the sun squeezed in a radius of about 10 km,

which makes them the most compact objects in the Universe that still have a surface and from which light can

still escape. These properties make neutron stars very important objects for both astronomy and physics. The

quite relativistic conditions around these objects which also posses surface magnetic field strength of ~ 10^12

Gauss have profound effects on the behaviour of atoms and propagation of light. Furthermore the density

inside neutron stars is expected to exceed the nuclear saturation density by at least a few times, which is

currently not reachable by laboratory experiments. In this talk I will try to summarize how astrophysical

observations of neutron stars allow us to constrain the properties of matter under these extreme conditions. I

will emphasize our efforts on constraining the surface magnetic fields and masses and radii of several neutron

stars using X-ray spectroscopy.

33

Yamaç Pehlivan Deliduman

Kısa Biyografi:

Yamaç Pehlivan fizik doktorasını 2004 yılında ODTÜ’den aldı. Wisconsin Üniversitesi (Madison) ve Japonya

Ulusal Gözlemevi’nde doktora sonrası araştırmacı olarak bulundu. 2009 yılından beri Mimar Sinan Güzel

Sanatlar Üniversitesi Fizik Bölümü’nde çalışmaktadır.

İlgi Alanları: Nötrino fiziği ve astrofiziği, Nükleer fizik, Çok parçacıklı sistemler

Konuşma Başlığı: Süpernova nötrinoları ve nükleer sentezlenme

Özet: Nötrinolar fotonlardan sonra evrende en bol bulunan parçacık türüdür. Küçük tesir kesitleri nedeniyle

son saçılma satıhları astrofiziksel nesnelerin derinliklerinde yer alır. Bu sayede bize fotonların

ulaştıramayacağı bilgileri ulaştırabilirler. Nötrino astronomisi altın çağını yaşamaya hazır bir fizik dalıdır, ve

bu alanda gerçekleşmeye en yakın olan gelişme çekirdek çökmeli süpernova nötrinolarının gözlenmesidir.

Bu konuşmamda nötrinoların astrofiziksel nesneler içindeki etkileşimlerinden ve bu ortamlarda maruz

kaldıkları çeşni salınımlarından bahsedeğim. Özel olarak çekirdek çökmeli süpernova içinde, hem süpernova

dinamiğine hem de burada gerçekleşen nükleer sentezlenme süreçlerine ilişkin oynadıkları rolleri ele

alacağım.

Seçilmiş Yayınlar:

Y. Pehlivan, A.B. Balantekin and T. Kajino, “Neutrino Magnetic Moment, CP Violation and Flavor

Oscillations in Matter,” Phys. Rev. D 90, 065011 (2014). [arXiv:1406.5489 [hep-ph]].

Y. Pehlivan, A. B. Balantekin, T. Kajino and T. Yoshida, “Invariants of Collective Neutrino Oscillations,”

Phys. Rev. D 84, 065008 (2011). [arXiv:1105.1182 [astro-ph.CO]].

A. B. Balantekin and Y. Pehlivan, “Neutrino-Neutrino Interactions and Flavor Mixing in Dense Matter,” J.

Phys. G 34, 47 (2007). [astro-ph/0607527].

34

ÖZETLER / ABSTRACTS

POSTER SUNUMLARI / POSTER PRESENTATIONS

** Poster sunumları listesi alfabetik isim sırası izlenerek düzenlenmiştir.

35

Ali Yılmaz, Gazi Üniversitesi

Sabit manyetik alanda hapsedilmiş Dirac Fermiyonları

Özet: Bu çalışmada, yüzeye dik bir manyetik alan içerisinde, belli bir kuvvet etkisi altında (2+1) boyutta Dirac

fermiyon sistemi için tam bir çözüm aranmıştır.Benzerlik dönüşümü kullanarak problemimizi kutupsal

koordinatlarda formülüze ederek spinör bileşenleri arasındaki ilişkinin tam kolaylıkla kullanılmasını

sağlamaya çalışılmıştır. Ayrıca; zayıf, güçlü ve ayar manyetik alan durumları gibi sınırlayıcı durumlar

kullanılmıştır. Özellikle, pozitif ve negatif enerji çözümleri arasında bir simetri olduğu gösterilmeye

çalışılmıştır.

Derya Gemici-Deveci, İstanbul Üniversitesi Fizik Bölümü

Quadratic interaction effect on the dark energy density in the universe

In this study, we deal with the holographic model of interacting dark components of dark energy and dark

matter quadratic case of the equation of state parameter (EoS). The effective equations of states for the

interacting holographic energy density are derived and the result are analyzed and compared with solution of

the linear form in the literature. The result of our work shows that the value of interaction term between dark

components effects the fixed points at far future in the DE dominated universe in the case of quadratic EoS

parameter, it is different result from the linear case in the theoretical results in the literature and as the Quintom

scenario the equations of state had coincidence at the cosmological constant boundary of −1 from above to

below.

Keywords Dark Energy, Dark Matter, cosmology, interactions

36

Ebru DEVLEN1, Ayşe ULUBAY2,3, E. Rennan PEKÜNLÜ1

Magnetorotational Instability In Diamagnetic Disks 1Ege University, Faculty of Science, Department of Astronomy & Space Sciences, 35100, Bornova, İzmir

2İstanbul University, Faculty of Science, Department of Physics, 34134, Vezneciler, İstanbul 3Feza Gürsey Center for Physics and Mathematics, Boğaziçi University, 34684, Çengelköy, İstanbul

Abstract: In the present study, the misalignment of the rotation axis of an accretion disk with respect to the

magnetic axis is taken into account for the purpose of analyzing the effect of the magnetic torque on the

magnetorotational instability (MRI) modified by the diamagnetism. The interaction between the magnetic

field and the induced electric current in the disk produces precessional torques and warping which may

modify the MRI. In the presence of the diamagnetic current, the torque is produced by the radial component

of the magnetic field. We therefore consider differentially rotating disk threaded by a poloidal magnetic field

subject to axisymmetric plane wave perturbations where we work in the Boussinesq limit. After linearizing

the MHD equations we obtained the dispersion relation, and solved it numerically to obtain the growth rates.

Our preliminary results suggest that the presence of the radial component of the magnetic field enhances the

MRI.

Ece Kilerci Eser, National Tsing Hua University Astronomi

The Origin of the Intrinsic Scatter in the Radius-Luminosity Relationship of Type 1 AGN

Abstract: Reverberation mapping analyses of nearby Type 1 AGN show an empirical correlation between

the broad line region (BLR) radius (R) and the mean optical luminosity (L) that is known as the R-L

relationship. It has been demonstrated (Watson et al. 2011) that AGNs can be used to measure cosmic distances

beyond redshifts that can be probed by Type Ia supernovae. By measuring the emission-line radius intrinsic

AGN luminosity can be obtained via the R-L relationship. The consequent AGN Hubble diagram can provide

the AGN distance. Currently the observed scatter in the R-L relationship is 0.13 dex and this leads to a scatter

of 0.33 mag in the distance modulus. In this work, we investigate the origin of the scatter in the R-L

relationship. We find that the observed scatter can potentially be reduced by using UV luminosity. This would

also reduce the scatter in the AGN Hubble diagram which would help to AGN to be powerful cosmic distance

indicators.

37

Merve Nur Cive, Mirac Ekim Vural, M. Altan Çakır, Istanbul Technical University

Deep Learning Techniques for an Anomaly Detection on Medical Images

Abstract: Deep Learning Techniques for an Anomaly Detection on Medical Images

Merve Nur Cive, Mirac Ekim Vural, Assoc. Prof. M. Altan Çakır, Istanbul Technical University (Turkey) This

project, which is a closer approach to anomaly detection applications on medical images, covers generation of

deep learning models in order to get statistical interpretation. These models are produced with advanced

statistical methods including generic machine learning algorithms.

The main idea is detection of anomalies, what should not be on tissue, by using medical images. The source

dataset is obtained from contracted hospital and online medical source based on a dicom file including medical

images and patient information as patient name, age, sex, slice thickness, etc.. In preprocessing section, the

information of patient and image corresponding to each file is acquired. In addition, images obtained from the

dicom files by using python libraries are classified in quantity of types of organ, train, and validation dataset.

By this processed dataset are trained, validated, and tested to build a reliable predictive model with different

class. Furthermore, generic learning algortihms are built by using Keras and Tensorflow tools which are

machine learning interfaces. The analysis demonstrates that deep learning methods improve the identification

of problematic tissues from medical images in an efficient way in future.

Keywords: Medical, DICOM, Deep Learning, Keras, Tensorflow

Mirac Ekim Vural, Sevda Yeliz Nar, M. Altan Çakır, Istanbul Technical University

Track Recognation on Peltier-Based Cloud Chamber

Abstract: Particles produced by nuclear decay, cosmic radiation and reactions are identified through various

methods. One of these methods being effective in the last century is the cloud chamber. In this project, peltier-

based cloud chamber cooled by peltier modules is improved. Track recognation was worked through OpenCv

and TensorFlow.

38

Muhammed Faruk Yıldırım, Çanakkale Onsekiz Mart Üniversitesi

Değmeye yakın EG cep ve DD mon örten çiftlerin yörünge dönem değişimlerinin

incelenmesi

Özet. Bu çalışmada, değmeye yakın (Near Contact Binaries (NCBs)) örten çift yıldızlar olan EG Cep ve DD

Mon sistemlerinin tutulma zamanlarının analizleri sunulacaktır. Her iki sistemin de minimum zamanları

kullanılarak hesaplanan O-C değerlerinin zamana göre incelenmesi sonucunda, yörünge dönemlerinin değişim

gösterdiği açıktır. Yapılan analizler sonucunda, EG Cep ve DD Mon sistemlerinin yörünge döneminin arttığı

belirlenmiş olup dönemlerdeki artma oranı hesaplanmış ve ayrıca dönemlerdeki değişimin ikinci bileşenden

birinci bileşene doğru kütle aktarımından kaynaklanabileceği önerilmiştir. Her iki örten çift sisteminde

yörünge dönemi sürekli ve çevrimsel değişimleri birlikte göstermektedir. Bu dizgeler için de yörünge

dönemindeki artış miktarı hesaplanmış ve ayrıca sinüsoidal değişimin nedenleri tartışılmıştır.

Özgür Ökcü, İstanbul Üniversitesi Fizik Bölümü

Yüklü AdS ve Kerr-AdS Karadeliklerinin Joule-Thomson Genleşmesi

Özet Bu çalışmada genişletilmiş faz uzayındaki (karadelik termodinamiğinin birinci yasasında P ve V

terimlerinin içerilmesi) yüklü Anti-de Sitter (AdS) ve Kerr-AdS (dönen) karadelikleri için ilk olarak bizim

tarafımızdan literatürde araştırılan Joule-Thomson (JT) genleşmesi kısaca ele alınmıştır [1-2]. Yüklü AdS

karadelikleri için inversiyon sıcaklığı analitik olarak elde edilip, minimum inversiyon sıcaklığı ve izoentalpik

eğirler belirlenmiştir. Kerr-AdS karadelikleri için birinci yasa ve Smarr ilişkisinden yola çıkarak JT genleşme

formülü türetilmiştir. Dönen karadelikler durumunda inversiyon eğrileri nümerik olarak elde edilmiştir.

[1] Ö. Ökcü, E. Aydıner, Eur. Phys. J. C, 77, 24 (2017).

[2] Ö. Ökcü, E. Aydıner, EPJ-C DOI: 10.1140/epjc/s10052-018-5602-x, arXiv:1709.06426 (2018).

39

Saime Gürbüz, Boğaziçi Üniversitesi

Kandilli Algıç Hızlandırıcı ve Enstrümentasyon Laboratuvarı (KAHVELab)

Özet: 2016 yılında faliyete geçen KAHVELab, Boğaziçi Üniversitesi Kandilli kampüsünde 200m2 çalışma

alanına sahip bir yüksek enerji fiziği laboratuvarıdır. Bünyesinde hızlandırıcı ve algıç yapımında gerekli olan

malzemeleri üretebileceğimiz freze, torna, hızar ve benzeri makineleri barındıran bir adet mekanik işlik, devre

kartlarının kontrollerinin ve lehimleme işlemlerinin yapıldığı bir adet elektronik işlik bulunmaktadır. Ayrıca

günümüz parçacık fiziği laboratuvarlarında bulunan standartlara uygun veri alım sistemi ve 3B yazıcı gibi bir

çok ek sistem de mevcuttur. Pek çok yüksek lisans & doktora öğrencisi ve araştırmacının çalıştığı

laboratuvarın güncel çalışma konularını şu başlıklar altında toplayabiliriz: elektron tabancası üretimi, RF

iletim hattı ve dolaştırıcı tasarımı ve üretilmesi, gecikmeli tel odası tasarımı & üretimi, CERN ATLAS

deneyinde yeni kuark araştırmaları.

Şule Çiftçi, Selçuk ve Sakarya Üniversitesi Fizik Bölümü

MIT Bates Laboratuvarı BLAST Deneyinde Polarize Döterondan Polarize Elektronların

Saçılması Reaksiyonuna ait Verilerin Dahili Analizi ile Dik ve Paralel Kinematik için W

Değişmez Kütle Eldesi

Özet: Nükleonlar başta olmak üzere parçacıkların özelliklerinin ve iç yapılarının anlaşılması amacıyla

parçacık çarpıştırma deneyleri yapılmaktadır. Bu deneyler, yüklü parçacık demetlerinin belirlenen bir enerji

düzeyine ulaşıncaya kadar hızlandırılması esasına dayanmaktadır. Bu hızlandırma işleminde parçacık fiziğinin

en önemli mekanizmalarından olan parçacık hızlandırıcıları kullanılmaktadır. Doğrusal hızlandırıcılar,

parçacıkların bir doğru boyunca hızlandırılmasıyla yüksek enerjili parçacıklar üretmektedir. Bu tür

hızlandırıcıların en önemli avantajı yüksek enerjili, mükemmel kalitede, yüksek yoğunluklu yüklü parçacık

demetlerini üretme kapasitesidir. Bu hızlandırıcıların üstün özelliklerini aşağıdaki maddelerle özetleyebiliriz:

Parçacıkların yüksek enerjilere hızlandırılması ve DC hızlandırıcılardaki gibi elektriksel bir sınırlandırma

bulunmaması, Demetlerin güçlü odaklanması ve yüksek yoğunluklu demetlerin oluşmasının kolay

sağlanabilmesi, Demetin hızlandırıcıdan bir kez geçmesi ve böylece dairesel hızlandırıcılardaki gibi yok edici

hata koşullarına maruz kalınmaması, Demetin düz bir doğru boyunca ilerlemesinden dolayı, sinkrotron

radyasyonundan kaynaklanan güç kaybının olmaması, Demetin doğrusal hızlandırıcıya enjeksiyonu ve

çıkışının dairesel hızlandırıcılara göre çok daha kolay olmasıdır.

40

Yıldıray Kömürcü, Istanbul Technical University

Radiation damage measurement using collision data in HCAL HE detector in CMS

experiment

Abstract: LHC experiment at CERN has collected a large amounth of data to be analyzed for new phyiscs

searches in Run II. This has been possible by constantly monitoring, upgrading and maintaining detector parts.

The CMS detector consists of four major detectors, silicon tracker, electromagnetic calorimeter, hadronic

calorimeter and muon chambers. Each of these detectors have their own subdetectors. Hadronic calorimeter is

a combination of hadronic barrel, hadronic endcap, hadronic forward and hadronic outer. These detectors are

degraded in time due to the high luminosity radiation they are exposed. The degradation in the detectors are

measured by two methods, laser and collision data. The comparison of the results obtained from two methods

is an important feedback for the future upgrades.

41

NOTLAR / NOTES:

42

NOTLAR / NOTES: