Evidence for transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in pbpb and ppb collisions
文献类型：期刊论文
| 作者 | Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Ero, J.; Flechl, M. |
| 刊名 | Physical review c
 |
| 出版日期 | 2015-09-22 |
| 卷号 | 92期号:3页码:26 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/physrevc.92.034911 |
| 通讯作者 | Khachatryan, v.() |
| 英文摘要 | A systematic study of the factorization of long-range azimuthal two-particle correlations into a product of single-particle anisotropies is presented as a function of pt and nu of both particles and as a function of the particle multiplicity in pbpb and ppb collisions. the data were taken with the cms detector for pbpb collisions at root snn = 2.76 tev and ppb collisions at root snn = 5.02 tev, covering a very wide range of multiplicity. factorization is observed to be broken as a function of both particle pt and nu. when measured with particles of different pt, the magnitude of the factorization breakdown for the second fourier harmonic reaches 20% for very central pbpb collisions but decreases rapidly as the multiplicity decreases. the data are consistent with viscous hydrodynamic predictions, which suggest that the effect of factorization breaking is mainly sensitive to the initial-state conditions rather than to the transport properties (e.g., shear viscosity) of the medium. the factorization breakdown is also computed with particles of different nu. the effect is found to be weakest for mid-central pbpb events but becomes larger for more central or peripheral pbpb collisions, and also for very-high-multiplicity ppb collisions. the nu-dependent factorization data provide new insights to the longitudinal evolution of the medium formed in heavy ion collisions. |
| WOS关键词 | RELATIVISTIC NUCLEAR COLLISIONS ; COLOR GLASS CONDENSATE ; HEAVY-ION COLLISIONS ; QUARK-GLUON PLASMA ; ANGULAR-CORRELATIONS ; LONG-RANGE ; FLOW ; TEV ; COLLABORATION ; PERSPECTIVE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000361668900005 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176562 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Khachatryan, V. |
| 作者单位 | 1.Yerevan Phys Inst, Yerevan, Armenia 2.Inst Hochenergiephys OeAW, Vienna, Austria 3.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 4.Univ Antwerp, B-2020 Antwerp, Belgium 5.Free Univ Brussels, Brussels, Belgium 6.Free Univ Brussels, Brussels, Belgium 7.Univ Ghent, B-9000 Ghent, Belgium 8.Catholic Univ Louvain, Louvain, Belgium 9.Univ Mons, B-7000 Mons, Belgium 10.Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil |
| 推荐引用方式 GB/T 7714 | Khachatryan, V.,Sirunyan, A. M.,Tumasyan, A.,et al. Evidence for transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in pbpb and ppb collisions[J]. Physical review c,2015,92(3):26. |
| APA | Khachatryan, V..,Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Asilar, E..,...&Goh, J.(2015).Evidence for transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in pbpb and ppb collisions.Physical review c,92(3),26. |
| MLA | Khachatryan, V.,et al."Evidence for transverse-momentum- and pseudorapidity-dependent event-plane fluctuations in pbpb and ppb collisions".Physical review c 92.3(2015):26. |
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