Azimuthal anisotropy of charged particles with transverse momentum up to 100GeV/c in PbPb collisions at root S-NN=5.02 TeV
- Title
- Azimuthal anisotropy of charged particles with transverse momentum up to 100GeV/c in PbPb collisions at root S-NN=5.02 TeV
- Author
- 김태정
- Keywords
- CMS; QGP; High-pT; Flow; Parton energy loss; Jet quenching
- Issue Date
- 2018-01
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- PHYSICS LETTERS B, v. 776, page. 195-216
- Abstract
- The Fourier coefficients v(2) and v(3) characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at root S-NN = 5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1 < p(T) < 100 GeV/c. The analysis focuses on the p(T) > 10 GeV/c 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 60% most central events. The v(2) coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to initial-state fluctuations. The values from both methods remain positive up to p(T) similar to 60-80 GeV/c, in all examined centrality classes. The v(3) coefficient, only measured with the scalar product method, tends to zero for p(T) greater than or similar to 20 GeV/c. 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. (C) 2017 The Author. Published by Elsevier B.V.
- URI
- https://www.sciencedirect.com/science/article/pii/S0370269317309334?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/117091
- ISSN
- 0370-2693; 1873-2445
- DOI
- 10.1016/j.physletb.2017.11.041
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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- Azimuthal anisotropy of charged particles with transverse momentum up to 100GeV c in PbPb collisions at root S-NN=5.02 TeV.pdfDownload
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