Energy and System-Size Dependence of Two- and Four- Particle V2 Measurements in Heavy-Ion Collisions at √snn=62.4 and 200 GeV and Their Implications on Flow Fluctuations and Nonflow

G. Agakishiev,M. M. Aggarwal,Z. Ahammed,A. V. Alakhverdyants,I. Alekseev,J. Alford,B. D. Anderson,C. Anson,D. Arkhipkin,G. S. Averichev,J. Balewski,D. Beavis,Nirbhay Kumar Behera,R. Bellwied,M. Betancourt,R. R. Betts,A. Bhasin,A. K. Bhati,H. Bichsel,Jaroslav Bielcik,Jana Bielčı́ková,L. C. Bland,I. G. Bordyuzhin,W. Borowski,J. Bouchet,E. Braidot,A. V. Brandin,A. Bridgeman,S. G. Brovko,E. Bruna,S. Bueltmann,I. Bunzarov,T. P. Burton,X. Z. Cai,H. Caines,M. Calderón De La Barca Sánchez,D. Cebra,R. Cendejas,M. C. Cervantes,P. Chaloupka,Sukalyan Chattopadhyay, H. F. Chen,J. H. Chen,J. Y. Chen,L. Chen, J. Cheng,M. Cherney,A. Chikanian,Kyungeon Choi,W. Christie,P. Chung,M. J. M. Codrington,R. Corliss,J. G. Cramer,H. J. Crawford,X.Y. Cui,A. Davila Leyva,L. C. De Silva,R. Debbe,T. G. Dedovich, J. Deng,A. A. Derevschikov,R. Derradi de Souza, L. Didenko,P. Djawotho,X. Dong,J. L. Drachenberg, J. E. Draper,C. M. Du,J. C. Dunlop,L. G. Efimov,M. Elnimr,J. Engelage, G. Eppley,M. Estienne,L. Eun,Olga Evdokimov,R. Fatemi, J. Fedorišin,R. G. Fersch,P. Filip,E. Finch,V. Fine,Y. Fisyak,C. A. Gagliardi,D. R. Gangadharan,F. J. M. Geurts,Premomoy Ghosh,Y. N. Gorbunov, A. Gordon,O. G. Grebenyuk, D. Grosnick,Anik Gupta,S. Gupta,W. Guryn,B. Haag,O. Hajkova,A. Hamed,L. Han,John William Harris,J. P. Hays-Wehle, M. Heinz,S. Heppelmann, A. Hirsch,G. W. Hoffmann,David Jonathan Hofman,B. Huang,H. Z. Huang,Thomas Humanic,L. Huo, G. Igo,W. W. Jacobs,C. Jena,F. Jin,J. Joseph,E. G. Judd, S. Kabana,K. Kang,J. Kapitan,K. Kauder,H. W. Ke,D. Keane,A. Kechechyan,David Kettler,D. P. Kikoła,J. Kiryluk,A. Kisiel,V. Kizka,S. R. Klein,Anders Garritt Knospe,D. D. Koetke,T. Kollegger,J. Konzer,I. Koralt,L. I. Koroleva,W. Korsch,L. Kotchenda,V. Kouchpil,П. Кравцов,K. Krueger,M. Krůs,Lokesh Kumar,M. A. C. Lamont,J. M. Landgraf,S. LaPointe,J. Lauret,A. Lebedev,R. Lednický,J. H. Lee,William Axel Leight,M. J. LeVine,C. Li,L. Li,N. Li,W. Li,X. Li,Y. Li,Z. M. Li,L. M. Lima,M. A. Lisa,F. Liu,H. Liu, J. Liu,T. Ljubičić,W. J. Llope,R. S. Longacre,Y. Lu,E. V. Lukashov,X. Luo, G. L., Y. G.,D. P. Mahapatra, R. Majka,O. Mall,R. Manweiler,S. Margetis,C. Markert,H. Masui,H. S. Matis,D. McDonald,T. S. McShane,A. Meschanin,R. Milner, N. G. Minaev,S. Mioduszewski,M. Mitrovski, Yasser Mohammed,Bedangadas Mohanty,Mitali Mondal,B. Morozov,Д. А. Морозов,Marcelo Gameiro Munhoz,M. K. Mustafa,M. Naglis, Basanta Kumar Nandi,T. K. Nayak,L. V. Nogach,S. B. Nurushev,G. Odyniec,A. Ogawa,K. Oh,Alice Elisabeth Ohlson,V. Okorokov,E. W. Oldag,Renato Aparecido Negrão de Oliveira,D. Olson,M. Pachr,B. S. Page,S. K. Pal,Y. Pandit,Y. Panebratsev,T. Pawlak,Hua Pei,T. Peitzmann,C. Perkins,W. Peryt,P. Pile,M. Planinić, J. Pluta,D. Plyku,Nikola Poljak,J. Porter,A. M. Poskanzer,C. B. Powell, D. Prindle,Claude Andre Pruneau,N. K. Pruthi,Prabhat Ranjan Pujahari,J. Putschke,Hao Qiu,R. Raniwala,S. Raniwala,R. Redwine,R. Reed,H. G. Ritter,Jay Roberts,O. V. Rogachevskiy,J. L. Romero,L. Ruan,J. Rusňák,N. R. Sahoo,I. Sakrejda,Sevil Salur,J. Sandweiss,E. Sangaline,Amal Sarkar, J. Schambach,R. P. Scharenberg,J. Schaub,Alexander Schmah,N. Schmitz,T. Schuster, J. Seele,Janet Elizabeth Seger,Ilya Selyuzhenkov,P. Seyboth,N. Shah, E. Shahaliev,M. Shao,B. Sharma,Meenakshi Sharma,S. S. Shi,Qiye Shou,E. P. Sichtermann,F. Simon, R. N. Singaraju,M. J. Skoby,N. Smirnov,D. Solanki,P. Sorensen, Ulisses Gulart de Souza,H. M. Spinka,B. Srivastava,T. D. S. Stanislaus,S. G. Steadman,J. R. Stevens, R. Stock,M. Strikhanov,B. Stringfellow,Alexandre Alarcon Do Passo Suaide,M. C. Suarez,N. L. Subba,M. Šumbera,X. M. Sun,Y. Sun,Z. Sun,B. Surrow,D. N. Svirida,T. J. M. Symons,A. Szanto de Toledo,Jun Takahashi,A. H. Tang,Z. Tang,L. H. Tarini,T. Tarnowsky,D. Thein,J. H. Thomas,J. Tian,Anthony Robert Timmins,D. Tlusty,M. Tokarev,S. Trentalange,R. E. Tribble,P. Tribedy,Barbara Antonina Trzeciak,O. D. Tsai,T. Ullrich,D. G. Underwood,G. Van Buren,G. van Nieuwenhuizen,J. A. Vanfossen,R. Varma,G. M. S. Vasconcelos,A. N. Vasiliev,F. Videbæk,Y. P. Viyogi,S. Vokál,Sergey Voloshin, M. Wada,Matthew Walker,F. Wang,G. Wang,H. Wang,J. S. Wang,Q. Wang,X. L. Wang,Y. Wang,G. Webb,J. C. Webb,G. D. Westfall,C. Whitten, H. Wieman, S. W. Wissink,R. Witt,W. Witzke,Y. F. Wu, Xiao Zhang,Wei Xie,H. Xu,N. Xu,Q. H. Xu,W. Xu,Y. Xu,Z. Xu,L. Xue,Yang Yu,P. Yepes,K. Yip,I. K. Yoo,M. Zawisza,H. Zbroszczyk,W. Zhan,J. B. Zhang,S. Zhang,W. M. Zhang,X. P. Zhang,Y. Zhang,Z. P. Zhang,Feng Zhao,J. Zhao,Zhong Chen,Xianglei Zhu,Ya Zhu,Y. Zoulkarneeva

Physical review C Nuclear physics/Physical review C, Nuclear physics（2012）

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摘要

We present STAR measurements of azimuthal anisotropy by means of the two- and four-particle cumulants v2 (v2{2} and v2{4}) for Au+Au and Cu+Cu collisions at center-of-mass energies √sNN=62.4 and 200 GeV. The difference between v2{2}2 and v2{4}2 is related to v2 fluctuations (σv2) and nonflow (δ2). We present an upper limit to σv2/v2. Following the assumption that eccentricity fluctuations σɛ dominate v2 fluctuations σv2v2≈σɛɛ we deduce the nonflow implied for several models of eccentricity fluctuations that would be required for consistency with v2{2} and v2{4}. We also present results on the ratio of v2 to eccentricity.6 MoreReceived 23 November 2011DOI:https://doi.org/10.1103/PhysRevC.86.014904©2012 American Physical Society

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