Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in ppb and pbpb collisions at the cern large hadron collider
文献类型：期刊论文
| 作者 | Sirunyan, A. M.1; Tumasyan, A.1; Adam, W.2; Ambrogi, F.2; Asilar, E.2; Bergauer, T.2; Brandstetter, J.2; Brondolin, E.2; Dragicevic, M.2; Eroe, J.2 |
| 刊名 | Physical review c
 |
| 出版日期 | 2018-04-23 |
| 卷号 | 97期号:4页码:34 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/physrevc.97.044912 |
| 通讯作者 | Sirunyan, a. m.() |
| 英文摘要 | Charge-dependent azimuthal correlations of same-and opposite-sign pairs with respect to the second-and third-order event planes have been measured in ppb collisions at root s(nn) = 8.16 tev and pbpb collisions at 5.02 tev with the cms experiment at the lhc. the measurement is motivated by the search for the charge separation phenomenon predicted by the chiral magnetic effect (cme) in heavy ion collisions. three-and two-particle azimuthal correlators are extracted as functions of the pseudorapidity difference, the transverse momentum (p(t)) difference, and the p(t) average of same-and opposite-charge pairs in various event multiplicity ranges. the data suggest that the charge-dependent three-particle correlators with respect to the second-and third-order event planes share a common origin, predominantly arising from charge-dependent two-particle azimuthal correlations coupled with an anisotropic flow. the cme is expected to lead to a v(2)-independent three-particle correlation when the magnetic field is fixed. using an event shape engineering technique, upper limits on the v(2)-independent fraction of the three-particle correlator are estimated to be 13% for ppb and 7% for pbpb collisions at 95% confidence level. the results of this analysis, both the dominance of two-particle correlations as a source of the three-particle results and the similarities seen between pbpb and ppb, provide stringent constraints on the origin of charge-dependent three-particle azimuthal correlations and challenge their interpretation as arising from a chiral magnetic effect in heavy ion collisions. |
| WOS关键词 | HEAVY-ION COLLISIONS ; NUCLEAR COLLISIONS ; PARITY VIOLATION ; HOT QCD ; EVENT ; LHC |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear |
| 语种 | 英语 |
| WOS记录号 | WOS:000430545800005 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177600 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Sirunyan, A. M. |
| 作者单位 | 1.Yerevan Phys Inst, Yerevan, Armenia 2.Inst Hochenergiephys, Vienna, Austria 3.Inst Nucl Problems, Minsk, Byelarus 4.Univ Antwerp, Antwerp, Belgium 5.Vrije Univ Brussel, Brussels, Belgium 6.Univ Libre Bruxelles, Brussels, Belgium 7.Univ Ghent, Ghent, Belgium 8.Catholic Univ Louvain, Louvain La Neuve, Belgium 9.Univ Mons, Mons, Belgium 10.Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil |
| 推荐引用方式 GB/T 7714 | Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in ppb and pbpb collisions at the cern large hadron collider[J]. Physical review c,2018,97(4):34. |
| APA | Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Ambrogi, F..,Asilar, E..,...&Castilla-Valdez, H..(2018).Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in ppb and pbpb collisions at the cern large hadron collider.Physical review c,97(4),34. |
| MLA | Sirunyan, A. M.,et al."Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in ppb and pbpb collisions at the cern large hadron collider".Physical review c 97.4(2018):34. |
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