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Adamczyk, L; Agakishiev, G; Aggarwal, M M; Aparin, A; Arkhipkin, D; Aschenauer, E C; Bhasin, A; Bielcikova, J; Bland, L C; Bordyuzhin, I G; Butterworth, J; Cebra, D; Cherney, M; Christie, W; Derevschikov, A A; Didenko, L; Drachenberg, J L; Du, C M; Engelage, J; Evdokimov, O; Eyser, O; Fazio, S; Fedorisin, J; Gagliardi, C A; Gibson, A; Gunarathne, D S; Gupta, S; Hamad, A; Hamed, A; Haque, R; Hirsch, A; Hofman, D J; Huang, H Z; Kabana, S; Kang, K; Ke, H W; Keane, D; Kisiel, A; Kotchenda, L; Landry, K D; Li, W; Li, N; Li, X; Ljubicic, T; Llope, W J; Ma, L; Ma, G L; Matis, H S; Nayak, T K; Odyniec, G; Okorokov, V; Olvitt, Jr, D L; Pan, Y X; Pei, H; Porter, J; Pruthi, N K; Quintero, A; Raniwala, S; Ruan, L; Rusnakova, O; Sahu, P K; Sarkar, A; Schambach, J; Schmah, A M; Schmitz, N; Shah, N; Shahaliev, E; Sharma, B; Shen, W Q; Sikora, R; Song, L; Sorensen, P; Stepanov, M; Sumbera, M; Sun, Z; Szelezniak, M A; Tawfik, A N; Thomas, J H; Timmins, A R; Tokarev, M; Trzeciak, B A; Upsal, I; Varma, R; Viyogi, Y P; Voloshin, S A; Wen, L; Wieman, H; Wu, Y F; Xiao, Z; Xu, Q H; Yang, S; Yang, Q; Ye, Z; Yi, L; Zha, W; Zhang, J B; Zhang, Z; Zhang, Y; Zhong, C; Zoulkarneeva, Y
Physical review letters, 06/2015, Letnik: 114, Številka: 25Journal Article
We present measurements of π(-) and π(+) elliptic flow, v(2), at midrapidity in Au+Au collisions at √s(NN)=200, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV, as a function of event-by-event charge asymmetry, A(ch), based on data from the STAR experiment at RHIC. We find that π(-) (π(+)) elliptic flow linearly increases (decreases) with charge asymmetry for most centrality bins at √s(NN)=27 GeV and higher. At √s(NN)=200 GeV, the slope of the difference of v(2) between π(-) and π(+) as a function of A(ch) exhibits a centrality dependence, which is qualitatively similar to calculations that incorporate a chiral magnetic wave effect. Similar centrality dependence is also observed at lower energies.
