計画研究 A02: 　 B ファクトリーにおける B とタウフレーバー物理の

研究

/ KL detection14/15 lyr. RPC+Fe

Tracking + dE/dxsmall cell + He/C2H5

CsI(Tl) 16X0

Aerogel Cherenkov cnt.n=1.015~1.030

Si vtx. det.3 lyr. DSSD

TOF counter

SC solenoid1.5T

BelleBelle DetectorDetector

8GeV e

3.5GeV e

KEK 　 B ファクトリー

B 物理

435.038.037.037.0 10]65.1[)(

BB

446.056.051.049.0 10]79.1[)(

BBFull reconstruction

Semi-leptonic tag

Signal evidence!

タウ物理

Tau LFV searchUL (x10-8) / L(fb-1)

Belle BaBar

4.5 535 6.8 232

e 12 535 11 232

6.5 401 13 339

e 9.2 401 19 339

12 401 11 339

e 8.0 401 14 339

’ 13 401 20 339

e’ 16 401 26 339

2.1 782 3.3 477

e 2.7 782 3.2 477

ee 1.8 782 2.2 477

eee 2.7 782 2.9 477

e 1.7 782 2.6 477

ee 1.5 782 1.8 477

6.8 543 2.6 451

e 6.3 543 4.6 451

K* 5.9 543 17 451

eK* 7.8 543 5.9 451

K* 10 543 7.3 451

eK* 7.7 543 4.6 451

13 543 19 451

e 7.3 543 3.1 451

8.9 543 10 451

e 18 543 11 451

UL (x10-8) / L(fb-1)

Belle BaBar

Ks 2.3 671 3.3 469

eKs 2.6 671 4.0 469

KsKs 8.0 671

eKsKs 7.1 671

3.4 671 29 221

e 4.4 671 12 221

K 10 671 32 221

eK 5.2 671 17 221

K 15 671 26 221

eK 5.7 671 32 221

KK 6.4 671 25 221

eKK 5.4 671 14 221

3.7 671 7.0 221

e 8.7 671 27 221

K 9.8 671 22 221

eK 6.9 671 18 221

KK 9.6 671 48 221

KeK 6.0 671 15 221

f0 3.4 671

ef0 3.4 671

7.2 154 5.8 237

14 154 5.9 237

Hadronic tau decays

を初検出

検出器開発

AMP+CFD

チェレンコフリングイメージ（ビームテスト結果）　 十分な分解能を発揮

成果状況（論文＆学会報告）1. K. Inami et al. (The Belle Collaboration), Phys. Lett. B 643, 5-10 (2006), First Observation of the Decay 2. Y.Miyazaki et al. (The Belle Collaboration), Phys. Lett. B 639, 159 (2006), Search for lepton flavor violating tau decays with a Ks meson.3. Y. Miyazaki et al. (The Belle collaboration), Phys. Lett. B 648, 341 (2007), Search for Lepton Flavor Violating Decays into lh, lh' and l0

4. Y. Miyazaki et al. (The Belle collaboration), Phys. Lett. B 660, 154 (2008), Search for Lepton Flavor Violating Decays into Three Leptons.5. Y. Nishio, K. Inami, T. Ohshima et al. (The Belle collaboration), Phys. Lett. B 664, 35 (2008), Search for lepton-flavor-violating l V0 decays at Belle.6. M. Fujikawa, H. Hayashii, S. Eidelman et al. (The Belle collaboration), Phys. Rev. D 78, 072006 (2008), High-Statistics Study of the Decay.7. K. Hayasaka et al. (The Belle collaboration), Phys. Lett. B 666, 16 (2008), New Search for and e decays at Belle.8. N. Kishimoto, M. Nagamine, K. Inami, Y. Enari, T. Ohshima, 　 Nucl.Instrum.Meth.A564:204-211,2006, Lifetime of MCP-PMT. 9. P. Krizan, S. Korpar, T. Iijima, Nucl.Instrum.Meth.A565:457-462,2006, Study of a nonhomogeneous aerogel radiator in a proximity focusing RICH detector. 10. K. Inami, T. Ohshima et al. Nucl. Instrum. Meth. A592:247-253 (2008), Cross-talk suppressed multi-anode MCP-PMT.

1. Int. Workshop on e+e- collisions from Phi to Psi (PhiPsi08), Frascati INFN, Italy, Apr. 7-10, 2008 - K. Inami , “Experimental review on lepton flavor violating tau decays“ ；2. - Y. Usuki , "Study for tau -> K*0Knu and tau -> eta + X decay at Belle“.3. 34th International Conference On High Energy Physics (ICHEP 2008) Philadelphia, USA, July 29- Aug. 5, 2008 - K. Inami , "Hadronic Tau Decays at Belle“.4. Int. workshop on Tau lepton (TAU08), Russia Novosibirsk BINP, Sep. 22-25, 2008 - Y. Miyazaki , "Search For Lepton Flavor Violating tau Decays at Belle“; 5. - Y. Usuki “ Tau decays with etas at Belle“, Y. Usuki “ tau -> K* K nu at Belle“.6. Symp. on Prospects in the Physics of Discrete Symmetries (DISCRETE'08), December 11-16, 2008, IFIC, Valencia, Spain - K. Hayasaka, “Searches for LFV at B factories“7. HEP2007 The 2007 Europhysics Conference on High Energy Physics (July 19-25, 2007, Manchester, England) - T. Ohshima , “Tau decays at Belle“ ；8. - Y. Miyazaki, "Search for Lepton-flavor violating tau decays“.9. Joint Meeting of Pacific Region Particle Physics Communities Oct 29-Nov 3, 2006, Honolulu, USA - Y. Miyazaki, "Searches for Lepton Flavor violating tau decays at Belle“.

10. The 1st Int. Conf. on Technology and Instrumentation in Particle Physics TIPP09, Tsukuba, Japan, Mar.12-17, 2009 - T. Iijima “Recent topics of Particle identification and photon detectors“; 11. - K. Inami “R&D of Particle identification devices with high precision timing“.12. BNM2008 3rd Int. Workshop on "B Factories and New Measurements Atami, Japan - K. Inami , “PID for super Belle”.13. 10th Int. Conf. on Instrumentation for Colliding Beam Physics February 28-March 5, BINP Novosibirsk, Russia. - T. Iijima, "Upgrade of KEK B-factory and Belle“.14. Pico-Second Timing Workshop Argonne National Laboratory, University of Chicago, Commissariat a l'Energie Atomique, March 27 & 28, 2008 - T. Ohshima , “TOP counter and MCP-PMT”.15. Workshop on timing detectors: Medical and Particle Physics applications, Lyon, France, October 15-16, 2008 - K. Inami , "Tests of MCP-PMT for the TOP counter“.16. Workshop on new hadrons with various flavors, Nagoya, Japan, December 6-7, 2008 - T. Iijima , "Upgrade plan of KEKB/Belle“, K. Inami "Detector R&D: Belle PID“.17. PD07 Int. Workshop on new photon-detectors June 27-29, 2007, Kobe U., Japan - K. Inami , “Timing properties of MCP-PMT”.18. Joint Meeting of Pacific Region Particle Physics Communities Oct 29-Nov 3, 2006, Honolulu, USA - D. Hayashi ,“Performance test of a RICH with time-of-flight information”.

19. Topical Workshop on Electronics for Particle Physics Naxos, Grece, Sep. 15-19, 2008 - Y. Okumura, “The commissioning status and results of ATLAS Level1 Endcap Muon Trigger System”.20. TWEPP-07 Topical Workshop on Electronics for Particle Physics, 3-7 Sep. 2007, Prague, Czech Republic - T. Sugimoto, "The 1st Result of Global Commissioning of the ATLAS Endcap Muon Trigger System in ATLAS Cavern“.21. 4th Int. Workshop on the CKM Unitarity Triangle (CKM2006) Dec 12-16, 2006, Nagoya, Japan - M. Tomoto, “Atlas & CMS rare decays”22. Joint Meeting of Pacific Region Particle Physics Communities Oct 29-Nov 3, 2006, Honolulu, USA - T. Sugimoto, "Current Status of ATLAS Endcap Muon Trigger System23. XIV International Workshop on Deep Inelastic Scattering (DIS 2006) April 20-24, 2006, Tsukuba, Japan - M. Tomoto, “Higgs Searches at Tevatron”. 他 ７件。

論文（ referred ）

学会発表＆ Proceedings