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Fluctuations of charge separation perpendicular to the event plane and local parity violation in s NN = 200 GeV Au + Au collisions at the BNL Relativistic Heavy Ion Collider

  • Author(s): Adamczyk, L;
  • Adkins, JK;
  • Agakishiev, G;
  • Aggarwal, MM;
  • Ahammed, Z;
  • Alekseev, I;
  • Alford, J;
  • Anson, CD;
  • Aparin, A;
  • Arkhipkin, D;
  • Aschenauer, E;
  • Averichev, GS;
  • Balewski, J;
  • Banerjee, A;
  • Barnovska, Z;
  • Beavis, DR;
  • Bellwied, R;
  • Betancourt, MJ;
  • Betts, RR;
  • Bhasin, A;
  • Bhati, AK;
  • Bhattarai, P;
  • 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;
  • 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;
  • Leyva, AD;
  • De Silva, LC;
  • Debbe, RR;
  • Dedovich, TG;
  • Deng, J;
  • De Souza, RD;
  • Dhamija, S;
  • Di Ruzza, B;
  • Didenko, L;
  • Dilks, C;
  • Ding, F;
  • Dion, A;
  • Djawotho, P;
  • Dong, X;
  • Drachenberg, JL;
  • Draper, JE;
  • Du, CM;
  • Dunkelberger, LE;
  • Dunlop, JC;
  • Efimov, LG;
  • Elnimr, M;
  • Engelage, J;
  • Engle, KS;
  • Eppley, G;
  • Eun, L;
  • Evdokimov, O;
  • Fatemi, R;
  • Fazio, S;
  • Fedorisin, J;
  • Fersch, RG;
  • Filip, P;
  • Finch, E;
  • Fisyak, Y;
  • Flores, CE;
  • Gagliardi, CA;
  • Gangadharan, DR;
  • Garand, D;
  • Geurts, F;
  • Gibson, A;
  • Gliske, S
  • et al.

Published Web Location
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Creative Commons 'BY-NC-ND' version 4.0 license

Previous experimental results based on data (∼15×106 events) collected by the STAR detector at the BNL Relativistic Heavy Ion Collider suggest event-by-event charge-separation fluctuations perpendicular to the event plane in noncentral heavy-ion collisions. Here we present the correlator previously used split into its two component parts to reveal correlations parallel and perpendicular to the event plane. The results are from a high-statistics 200-GeV Au + Au collisions data set (57×106 events) collected by the STAR experiment. We explicitly count units of charge separation from which we find clear evidence for more charge-separation fluctuations perpendicular than parallel to the event plane. We also employ a modified correlator to study the possible P-even background in same- and opposite-charge correlations, and find that the P-even background may largely be explained by momentum conservation and collective motion. © 2013 American Physical Society.

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