analysis at cern
DESCRIPTION
Analysis at CERN. 2 particle correlation about Pb-Pb 3.52TeV. Kazuki Oshima. outline. 2 particle correlation Event mixing Cut Result. 2 particle correlation. Get ΔΦ Δη about all trigger and associate tpc track pairs. event mixing. Devide event about centrality and Z vertex - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/1.jpg)
ANALYSIS AT CERN
KAZUKI OSHIMA
2 particle correlation about Pb-Pb 3.52TeV
![Page 2: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/2.jpg)
OUTLINE
• 2 particle correlation
• Event mixing
• Cut
• Result
![Page 3: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/3.jpg)
2 PARTICLE CORRELATION
Get ΔΦ Δη about all trigger and associate tpc track pairs
![Page 4: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/4.jpg)
Devide event about centrality and Z vertex
Pool into 10 × 10 Box
Become 3 events, get 2 particle correlation
3 real part & 6 event mixing pairs
Calculate correlation function
EVENT MIXING
![Page 5: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/5.jpg)
EVENT SELECTION
Use ESD file LHC11h(2) Pb-Pb 3.57 TeV
Run number
168988,170269,169837,168108,169238,170207
Event Cut
• |Zvertex|<10cm ESD Track cut
• TPC acceptance |Δη|<0.9• ITS matching
![Page 6: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/6.jpg)
RESULT
![Page 7: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/7.jpg)
CENTRALITY DEPENDENCE
trigger 2-3GeV, associate 1-2GeV
![Page 8: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/8.jpg)
ETA PROJECTION
• 1.0<|Δη| <1.8
• Fit by Fourier series
![Page 9: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/9.jpg)
VN PLOT
v1 v2 v3
v4 v5 v6
(x,y):(centrality,vn)
![Page 10: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/10.jpg)
TRIGGER DEPENDENCEProjection about Centrality 0-10%
![Page 11: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/11.jpg)
V2 TRIGGER DEPENDENCE
2-3GeV
3-4GeV
5-6GeV
4-5GeV
centrality
![Page 12: Analysis at CERN](https://reader035.vdocuments.pub/reader035/viewer/2022062422/56813324550346895d9a07a5/html5/thumbnails/12.jpg)
OUTLOOK
Look again fitting error
move associate pt fixed 1-2GeV this time
Calculate severally vn
Consider more event cut and quality track cut
to remove something like v2 of eta direction