Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV in PbPb collisions at sqrt(s[NN]) = 5.02 TeV
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(1)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(2)
,
(1)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(3)
,
(4)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
,
,
(5)
,
(5)
,
(5)
,
(5)
,
(5)
1
2
3
4
5
2
3
4
5
A.M. Sirunyan
- Function : Author
S. Baffioni
- Function : Author
- PersonId : 20331
- IdHAL : stephanie-barrillon
- ORCID : 0000-0002-7075-1673
P. Busson
- Function : Author
- PersonId : 741166
- IdHAL : phbusson
- ORCID : 0000-0001-6027-4511
- IdRef : 033562466
R. Granier De Cassagnac
- Function : Author
- PersonId : 739189
- IdHAL : raphgrandecass
- ORCID : 0000-0002-1275-7292
- IdRef : 132136651
P. Paganini
- Function : Author
- PersonId : 739173
- IdHAL : pascal-paganini
- ORCID : 0000-0001-9580-683X
- IdRef : 183219406
N. Chanon
- Function : Author
- PersonId : 742432
- IdHAL : nicolas-chanon
- ORCID : 0000-0002-2939-5646
- IdRef : 235525227
C. Collard
- Function : Author
- PersonId : 753602
- IdHAL : caroline-collard
- ORCID : 0000-0002-5230-8387
- IdRef : 223465992
M. Gouzevitch
- Function : Author
- PersonId : 741096
- IdHAL : maxime-gouzevitch
- ORCID : 0000-0002-5524-880X
- IdRef : 13627160X
Fabienne Lagarde
- Function : Author
- PersonId : 175605
- IdHAL : fabienne-lagarde
- ORCID : 0000-0002-4015-4376
- IdRef : 076981606
M. Lethuillier
- Function : Author
- PersonId : 740178
- IdHAL : morgan-lethuillier
- ORCID : 0000-0001-6185-2045
- IdRef : 090177835
A. Popov
- Function : Author
V. Sordini
- Function : Author
- PersonId : 739810
- IdHAL : viola-sordini
- ORCID : 0000-0003-0885-824X
- IdRef : 128184035
S. Viret
- Function : Author
- PersonId : 1093632
- IdHAL : seb-viret
- ORCID : 0000-0002-1935-623X
Abstract
The Fourier coefficients v[2] and v[3] characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sqrt(s[NN])= 5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, pt= 1-100 GeV. The analysis focuses on pt > 10 GeV range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60x% most central events. The v[2] coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to the initial-state fluctuations. The values of both methods remain positive up to pt ~ 70 GeV, in all examined centrality classes. The v[3] coefficient, only measured with the scalar product method, tends to zero for pt >~ 20 GeV. Comparisons between theoretical calculations and data provide new constraints on the path-length dependence of parton energy loss in heavy ion collisions and highlight the importance of the initial-state fluctuations.
Origin : Publisher files allowed on an open archive
Loading...