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

L Adamczyk,D Garand,T D S Stanislaus,H Masui,T S Mcshane,J Engelage,Y Zawisza,H Z Huang,M Elnimr,K Yip,P Pile,D Keane,Y P Viyogi,M Calderón De La Barca Sánchez,J Bouchet,J Sandweiss,C Dilks,S Dhamija,B Pawlik,S Fazio,A Kechechyan,T Pawlak,D J Hofman,S Heppelmann,Y Sun,J H Chen,H Pei,A Banerjee,A Chikanian,D R Gangadharan,I Kisel,Q H Xu,R P Scharenberg,L M Lima,Z Barnovska,D Mcdonald,A Lebedev,F Wang,B Schmidke,M Tokarev,G Van Buren,A Ogawa,W Peryt,C K Riley,H Wang,S Bültmann,N Schmitz,W Borowski,T K Nayak,Y Mohammed,I Sakrejda,Y Pandit,R R Betts,B Haag,B Mohanty,K Kang,J Zhao,Y Guo,J M Nelson,Y X Pan,D M M D Madagodagettige Don,J Alford,K Kauder,S Horvat,M C Cervantes,O V Rogachevskiy,E P Sichtermann,S Das,A Vossen,Y Panebratsev,S Gliske,M M Aggarwal,R S Longacre,W Q Shen,M Shao,R Cendejas,E G Judd,G D Westfall,Z Tang,H Xu,M Zyzak,A Kisiel,G Igo,J M Landgraf,J Turnau,N K Pruthi,A Bhasin,A Ohlson,G Webb,P K Sahu,H F Chen,G Wang,P Chaloupka,C Jena,J F Ross,K Oh,B S Page,D Smirnov,O Hajkova,N Shah,A Gupta,L Didenko,J G Cramer,N Xu,M Strikhanov,B Sharma,S Margetis,S G Brovko,G Van Nieuwenhuizen,M J M Codrington,M Cherney,H S Matis,P Tribedy,L C De Silva,I Alekseev,J L Drachenberg,G S Averichev,L E Dunkelberger,A K Bhati,I Koralt,J Putschke,E Shahaliev,O G Grebenyuk,S Zhang,X L Wang,H Caines,P Yepes,X Dong,J H Thomas,Y Zhang,Z Sun,Q Wang,D Tlusty,J Seger,U G Desouza,A M Poskanzer,F Videbæk,X Zhu,J Porter,D Cebra,Y Zoulkarneeva,R E Tribble,J Pluta,R L Ray,R A Kycia,L V Nogach,O D Tsai,L Kumar,Y Fisyak,J C Webb,O Evdokimov,K D Landry,W Guryn,S Gupta,J C Dunlop,T Ullrich,S K Pal,Md Nasim,R Majka,K Krueger,A Roy,A Davila Leyva,J W Harris,S Raniwala,A Gibson,J Cheng,R G Fersch,X Cui,P Djawotho,G W Hoffmann,N Poljak,K Xin,T J M Symons,R Stock,C Perkins,G Odyniec,R Witt,H M Spinka,A Aparin,M C Suarez,D P Mahapatra,C Yang,P Bhattarai,J Y Chen,D Grosnick,J Lauret,G Agakishiev,M Naglis,P Huck,T Kollegger,A V Brandin,F Liu,C A Gagliardi,A Sarkar,J A Vanfossen,C Markert,J Takahashi,D Arkhipkin,E Bruna,X P Zhang,C B Powell,S Salur,C M Du,W Zha,R Derradi De Souza,Z Xu,S Mioduszewski,H Qiu,A Szanto De Toledo,Z P Zhang,M J Levine,J Kiryluk,J L Romero,S S Shi,R Corliss,L Chen,T P Burton,W Li,X Luo,J S Wang,D Solanki,M G Munhoz,M Wada,A Kesich,J H Lee,I G Bordyuzhin,E Finch,W J Llope,R Raniwala,X M Sun,A H Tang,V Okorokov,S Kabana,B K Nandi,A Sandacz,L Kotchenda,C Li,T J Humanic,J Balewski,R Bellwied,W W Jacobs,S Ramachandran,A Dion,F Ding,H J Crawford,J Konzer,W Xie,D D Koetke,Y Xu,A Hamed,Y Li,X Li,P Seyboth,H G Ritter,P Chung,L Yi,P Sorensen,S Chattopadhyay,T Tarnowsky,E Sangaline,S Trentalange,H W Ke,L H Tarini,M K Mustafa,B A Trzeciak,J P Hays-Wehle,J E Draper,S Lapointe,P R Pujahari,Z Chang,K S Engle,J B Zhang,R Fatemi,H Wieman,I Bunzarov,L C Bland,B Surrow,W Korsch,A Hirsch,L Ruan,L Eun,Z Ahammed,T G Dedovich,H Bichsel,B Di Ruzza,D Olson,M J Skoby,D G Underwood,M Walker,M M Mondal,P Filip,J K Adkins,B Huang,R Varma,E W Oldag,J Deng,C Pruneau,D N Svirida,W Xu,M A Lisa,R Haque,S W Wissink,A R Timmins,Y F Wu,D Plyku,Y Wang,J Schambach,H Zbroszczyk,I Kulakov,M Pachr,B Stringfellow,N Smirnov,J R Stevens,B Srivastava,S A Voloshin,Z M Li,G Eppley,W Christie,L G Efimov,E C Aschenauer ,G L ,M Šumbera ,L Han ,Alexandre Alarcon Do Passo Suaide ,J Roberts ,J Bielčíková ,N Sahoo ,I K Yoo ,G M.s Vasconcelos ,Q Shou ,R Debbe ,C Anson ,Meenakshi Sharma ,R Vértesi ,Feng Zhao ,M A.c Lamont ,J M Butterworth ,J Bielčík ,R A Negrao De Oliveira ,T Ljubičić ,J Novák ,M Mitrovski ,Yi Yang ,S Vokál ,D P Kikoła ,J J Chwastowski ,F J M Geurts ,Xiao Zhang ,Zhong Chen ,R Lednický ,R Singaraju ,J Fedorišin ,Yan Wang ,M Planinić ,M Przybycień ,C Flores ,П Кравцов ,J Rusňák ,A Schmah ,T Schuster ,M Betancourt ,D Beavis ,Y Zhu ,W A Leight ,Y G

doi:10.1103/physrevc.88.064911

Abstract

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.2 MoreReceived 12 August 2013DOI:https://doi.org/10.1103/PhysRevC.88.064911©2013 American Physical Society

Full Text