Beam-energy dependence of charge separation along the magnetic field in Au+Au collisions at RHIC.

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

doi:10.1103/physrevlett.113.052302

Abstract

Local parity-odd domains are theorized to form inside a quark-gluon plasma which has been produced in high-energy heavy-ion collisions. The local parity-odd domains manifest themselves as charge separation along the magnetic field axis via the chiral magnetic effect. The experimental observation of charge separation has previously been reported for heavy-ion collisions at the top RHIC energies. In this Letter, we present the results of the beam-energy dependence of the charge correlations in Au+Au collisions at midrapidity for center-of-mass energies of 7.7, 11.5, 19.6, 27, 39, and 62.4GeV from the STAR experiment. After background subtraction, the signal gradually reduces with decreased beam energy and tends to vanish by 7.7GeV. This implies the dominance of hadronic interactions over partonic ones at lower collision energies.

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