Charge-dependent flow and the search for the chiral magnetic wave in Pb-Pb collisions at root s(NN)=2.76 TeV

0472838 - ÚJF 2017 RIV US eng J - Journal Article
Adam, J. - Adamová, Dagmar - Benáček, Pavel - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Eyyubova, G. - Ferencei, Jozef - Horák, D. - Křížek, Filip - Kučera, Vít - Mareš, Jiří A. - Petráček, V. - Pospíšil, Jan - Schulc, M. - Špaček, M. - Šumbera, Michal - Vajzer, Michal - Vaňát, Tomáš - Závada, Petr … Total 995 authors
Charge-dependent flow and the search for the chiral magnetic wave in Pb-Pb collisions at root s(NN)=2.76 TeV.
Physical Review C. Roč. 93, č. 4 (2016), č. článku 044903. ISSN 2469-9985. E-ISSN 2469-9993
R&D Projects: GA MŠMT(CZ) LG13031
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion collisions * charge-dependent
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 3.820, year: 2016
Method of publishing: Open access
https://doi.org/10.1103/PhysRevC.93.044903

We report on measurements of a charge-dependent flow using a novel three-particle correlator with ALICE in Pb-Pb collisions at the CERN Large Hadron Collider (LHC), and discuss the implications for observation of local parity violation and the chiral magnetic wave (CMW) in heavy-ion collisions. Charge-dependent flow is reported for different collision centralities as a function of the event charge asymmetry. While our results are in qualitative agreement with expectations based on the CMW, the nonzero signal observed in higher harmonics correlations indicates a possible significant background contribution. We also present results on a differential correlator, where the flow of positive and negative charges is reported as a function of the mean charge of the particles and their pseudorapidity separation. We argue that this differential correlator is better suited to distinguish the differences in positive and negative charges expected due to the CMW and the background effects, such as local charge conservation coupled with strong radial and anisotropic flow.
Permanent Link: http://hdl.handle.net/11104/0270057