Elliptic flow of identified hadrons in Au+Au collisions atsNN=7.7–62.4 GeV

Leszek Adamczyk,J. K. Adkins,G. Agakishiev,M. M. Aggarwal,Zubayer Ahammed,I. Alekseev,J Alford,Christopher Daniel Anson,A. Aparin,D Arkhipkin,E C Aschenauer,G.S. Averichev,J. Balewski,Aditi Banerjee,Zuzana Barnovska,D. R. Beavis,Rene Bellwied,Michael Joseph Betancourt,R. R. Betts,Anju Bhasin,A. K. Bhati,P. Bhattarai,H. Bichsel,J Bielcik,J. Bielcikova,L. C. Bland,I. G. Bordyuzhin,W Borowski,J. Bouchet,A. V. Brandin,S. G. Brovko,Emilio M. Bruna,S. Bültmann,I. Bunzarov,T. P. Burton,J.M. Butterworth,Xu Cai,Helen Louise Caines,M. Calderon de la Barca Sanchez,D. Cebra,R. Cendejas,M. C. Cervantes,P. Chaloupka,Z. Chang,Sukalyan Chattopadhyay,H. F. Chen,Jian Chen,Jianing Chen,L. Chen,J. Cheng,Michael G. Cherney,A. Chikanian,W. Christie,P. Chung,J. J. Chwastowski,M. J. M. Codrington,R. Corliss,J.G. Cramer,H. J. Crawford,X. Cui,S. Das,A. Davila Leyva,L.C. De Silva,Ramiro Debbe,T.G. Dedovich,Jun Deng,R. Derradi de Souza,S. Dhamija,B. Di Ruzza,L. Didenko,F. Ding,A Dion,P. Djawotho,X. Dong,J. L. Drachenberg,J. E. Draper,C. M. Du,L. E. Dunkelberger,J.C. Dunlop,L.G. Efimov,M. Elnimr,J. Engelage,G. Eppley,L. Eun,O. Evdokimov,R Fatemi,S. Fazio,J. Fedorisin,R. G. Fersch,P Filip,E. Finch,Y. Fisyak,E. Flores,C. A. Gagliardi,Dhevan Raja Gangadharan,D. Garand,F.J.M. Geurts,Adam Gibson,S. Gliske,O.G. Grebenyuk,D. Grosnick,A. Gupta,S.K. Gupta,W. Guryn,B. Haag,O. Hajkova,A. Hamed,Liang Han,J.W. Harris,James Prewitt Hays-Wehle,S. Heppelmann,A. S. Hirsch,G. W. Hoffmann,D.J. Hofman,S. Horvat,B Huang,H. Z. Huang,P. Huck,T.J. Humanic,G.J. Igo,W.W. Jacobs,Chitrasen Jena,E. G. Judd,S Kabana,K Kang,J. Kapitan,K. Kauder,H. W. Ke,D. Keane,A. Kechechyan,A. Kesich,Daniel Kikola,J. Kiryluk,Ivan Kisel,A. Kisiel,S. R. Klein,D.D. Koetke,Thorsten Kollegger,J. Konzer,I. Koralt,W. Korsch,L. Kotchenda,P. Kravtsov,K. Krueger,Igor Kulakov,Lokesh Kumar,M A C Lamont,J. M. Landgraf,K. D. Landry,S Lapointe,J Lauret,A. Lebedev,R. Lednicky,J.H. Lee,William Axel Leight,M.J. LeVine,C Li,W.G. Li,Xiang Li,Y. Li,Zhiming Li,L. M. Lima,M. A. Lisa,F.H. Liu,T Ljubicic,William Llope,R.S. Longacre,Yuerui Lu,Xi-Wang Luo,A. Łuszczak,G. L. Ma,Y. G. Ma,D. M. M. D. Madagodagettige Don,D. P. Mahapatra,Richard Daniel Majka,S. Margetis,C. Markert,H Masui,H.S. Matis,Donald M. McDonald,T. S. McShane,S Mioduszewski,M. K. Mitrovski,Y Mohammed,B. Mohanty,Mriganka Mouli Mondal,M. G. Munhoz,M. K. Mustafa,M. Naglis,B. K. Nandi,Md. Nasim,T. K. Nayak,J. M. Nelson,L. V. Nogach,J. Novák,G. Odyniec,A Ogawa,K. Oh,A Ohlson,V. A. Okorokov,E. W. Oldag,R. A. N. Oliveira,D L Olson,M. Pachr,B. S. Page,S.K. Pal,Y X Pan,Y. Pandit,Y. Panebratsev,T. Pawlak,B. Pawlik,Hua Pei,C. Perkins,W. Peryt,P. Pile,M. Planinic,Jan Marian Pluta,N. Poljak,J Porter,A.M. Poskanzer,C. B. Powell,C.A. Pruneau,N. K. Pruthi,M. Przybycień,Prabhat Ranjan Pujahari,J. Putschke,Hao Qiu,S Ramachandran,R. Raniwala,Sudhir Raniwala,Rajarshi Ray,C. K. Riley,H.G. Ritter,Jay Roberts,O.V. Rogachevskiy,J. L. Romero,J.F. Ross,L. Ruan,J. Rusnak,N R Sahoo,P. K. Sahu,I. Sakrejda,Sevil Salur,A. Sandacz,J. Sandweiss,E. Sangaline,A. Sarkar,J. Schambach,R. P. Scharenberg,Alexander Schmah,B Schmidke,N. Schmitz,T. R. Schuster,Janet Elizabeth Seger,P. Seyboth,Nilay Shah,E. Shahaliev,M. Shao,B. Sharma,M Sharma,S. S. Shi,Q. Y. Shou,E.P. Sichtermann,R.N. Singaraju,M.J. Skoby,D. Smirnov,Nikita Smirnov,D. Solanki,P. Sørensen,U. G. Desouza,H. M. Spinka,B. K. Srivastava,T.D.S. Stanislaus,J.R. Stevens,R. Stock,M.N. Strikhanov,B C. Stringfellow,A. A. P. Suaide,M. C. Suárez,M Šumbera,X.M. Sun,Y J Sun,Z. Y. Sun,Bernd Surrow,D.N. Svirida,T. J. M. Symons,A. Szanto de Toledo,J. Takahashi,A. H. Tang,Z. Tang,L. H. Tarini,T. Tarnowsky,J.H. Thomas,Jifa Tian,A. R. Timmins,D. Tlusty,M. Tokarev,S. Trentalange,R. E. Tribble,Prithwish Tribedy,Barbara Antonina Trzeciak,O. D. Tsai,J. Turnau,T Ullrich,D.G. Underwood,G. Van Buren,G. van Nieuwenhuizen,J. A. Vanfossen,Raghava Varma,G M S Vasconcelos,F. Videbaek,Y. P. Viyogi,S. Vokal,S.A. Voloshin,A. Vossen,M. Wada,Fuqiang Wang,G Wang,H. Wang,J.-S. Wang,Qi Wang,X.-L. Wang,Y. Wang,G Webb,J. C. Webb,G.D. Westfall,C. A. Whitten,H.H. Wieman,S.W. Wissink,R. Witt,Y. F. Wu,Zhigang Xiao,W. Xie,K. Xin,H. S. Xu,N. Xu,Qingnian Xu,W Xu,Yizhuang Xu,Z. Z. Xu,Li Xue,Y Yang,P. Yepes,Li Yi,K. Yip,I.K. Yoo,M. Zawisza,Hanna Paulina Zbroszczyk,Jingqing Zhang,S. H. Zhang,Xing Zhang,Y Zhang,Z.P. Zhang,F. Zhao,J. B. Zhao,C. Zhong,X. L. Zhu,Y.H. Zhu,Y. Zoulkarneeva,Maksym Zyzak

Elliptic flow of identified hadrons in Au+Au collisions atsNN=7.7–62.4 GeV

2013

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; Bultmann, S; Bunzarov, I; Burton, TP; Butterworth, J; Cai, XZ; Caines, H; Calderon De La Barca Sanchez, 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; Di Ruzza, B; 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 | Abstract: Measurements of the elliptic flow, v2, of identified hadrons (π±, K±, Ks0, p, p, φ, Λ, Λ, Ξ-, Ξ+, Ω-, Ω+) in Au+Au collisions at √sNN=7.7, 11.5, 19.6, 27, 39, and 62.4 GeV are presented. The measurements were done at midrapidity using the time-projection chamber and the time-of-flight detectors of the Solenoidal Tracker at RHIC experiment during the beam-energy scan program at Relativistic Heavy Ion Collider. A significant difference in the v2values for particles and the corresponding antiparticles was observed at all transverse momenta for the first time. The difference increases with decreasing center-of-mass energy, √sNN(or increasing baryon chemical potential, μB), and is larger for the baryons as compared to the mesons. This implies that particles and antiparticles are no longer consistent with the universal number-of-constituent quark (NCQ) scaling of v2that was observed at √sNN=200 GeV. However, for the selected group of particles (π+, K+, Ks0, p, Λ, Ξ-, Ω-) NCQ scaling at (mT-m0)/nqg0.4 GeV/c2 is not violated within ±10%. The v2values for φ mesons at 7.7 and 11.5 GeV are approximately two standard deviations from the trend defined by the other hadrons at the highest measured pTvalues. © 2013 American Physical Society.

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