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Measurement of charge multiplicity asymmetry correlations in high-energy nucleus-nucleus collisions at sNN =200 GeV

  • Author(s): Adamczyk, L
  • Adkins, JK
  • Agakishiev, G
  • Aggarwal, MM
  • Ahammed, Z
  • Alakhverdyants, AV
  • Alekseev, I
  • Alford, J
  • Anson, CD
  • Arkhipkin, D
  • Aschenauer, E
  • Averichev, GS
  • Balewski, J
  • Banerjee, A
  • Barnovska, Z
  • Beavis, DR
  • Bellwied, R
  • Betancourt, MJ
  • Betts, RR
  • Bhasin, A
  • Bhati, AK
  • Bichsel, H
  • Bielcik, J
  • Bielcikova, J
  • Bland, LC
  • Bordyuzhin, IG
  • Borowski, W
  • Bouchet, J
  • Brandin, AV
  • Brovko, SG
  • Bruna, E
  • Bültmann, S
  • Bunzarov, I
  • Burton, TP
  • Butterworth, J
  • Cai, XZ
  • Caines, H
  • Calderón De La Barca Sánchez, M
  • Cebra, D
  • Cendejas, R
  • Cervantes, MC
  • Chaloupka, P
  • Chang, Z
  • Chattopadhyay, S
  • Chen, HF
  • Chen, JH
  • Chen, JY
  • Chen, L
  • Cheng, J
  • Cherney, M
  • Chikanian, A
  • Christie, W
  • Chung, P
  • Chwastowski, J
  • Codrington, MJM
  • Corliss, R
  • Cramer, JG
  • Crawford, HJ
  • Cui, X
  • Das, S
  • Davila Leyva, A
  • De Silva, LC
  • Debbe, RR
  • Dedovich, TG
  • Deng, J
  • Derradi De Souza, R
  • Dhamija, S
  • Didenko, L
  • Ding, F
  • Dion, A
  • Djawotho, P
  • Dong, X
  • Drachenberg, JL
  • Draper, JE
  • Du, CM
  • Dunkelberger, LE
  • Dunlop, JC
  • Efimov, LG
  • Elnimr, M
  • Engelage, J
  • Eppley, G
  • Eun, L
  • Evdokimov, O
  • Fatemi, R
  • Fazio, S
  • Fedorisin, J
  • Fersch, RG
  • Filip, P
  • Finch, E
  • Fisyak, Y
  • Flores, E
  • Gagliardi, CA
  • Gangadharan, DR
  • Garand, D
  • Geurts, F
  • Gibson, A
  • Gliske, S
  • Gorbunov, YN
  • Grebenyuk, OG
  • Grosnick, D
  • et al.
Abstract

A study is reported of the same- and opposite-sign charge-dependent azimuthal correlations with respect to the event plane in Au+Au collisions at sNN=200 GeV. The charge multiplicity asymmetries between the up/down and left/right hemispheres relative to the event plane are utilized. The contributions from statistical fluctuations and detector effects were subtracted from the (co-)variance of the observed charge multiplicity asymmetries. In the mid- to most-central collisions, the same- (opposite-) sign pairs are preferentially emitted in back-to-back (aligned on the same-side) directions. The charge separation across the event plane, measured by the difference, Δ, between the like- and unlike-sign up/down-left/right correlations, is largest near the event plane. The difference is found to be proportional to the event-by-event final-state particle ellipticity (via the observed second-order harmonic v2obs), where Δ=[1.3±1.4(stat)-1.0+4.0(syst)]×10- 5+[3.2±0.2(stat)-0.3+0.4(syst)]×10-3v2obs for 20-40% Au+Au collisions. The implications for the proposed chiral magnetic effect are discussed. © 2014 American Physical Society.

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