Azimuthal anisotropy ofπ0andηmesons in Au + Au collisions atsNN=200GeV

A Adare,C Vale,K Kiriluk,A Taranenko,S Nagamiya,K N Barish,A Sukhanov,T Liška,G S Kyle,E Kistenev,I Ravinovich,J Newby,A A Bickley,J Seele,S Esumi,A Toia,D Lynch,M Virius,P Mikeš,M Proissl,V Singh,C Silvestre,R Bennett,P Chung,P L Mcgaughey,K Nakano,B Sahlmueller,M Gonin,M J Tannenbaum,T Horaguchi,D M Lee,A Denisov,A Franz,I E Yushmanov,A D Frawley,I V Sourikova,Y Goto,V Peresedov,M Ouchida,R Granier De Cassagnac,A Kravitz,K Karatsu,B Komkov,B Fadem,D E Fields,R S Towell,K Boyle,E Vznuzdaev,J L Nagle,M Chiu,K S Sim,K Kurita,V Bumazhnov,R Belmont,E M Takagui,D Roach,S Yokkaichi,F Wei,J Hanks,M Mccumber,J Koster,N Means,J Ide,K Okada,Y Fukao,G Bunce,V Babintsev,C Baumann,K Tanida,R Tanabe,Y Watanabe,T Ichihara,R Seto,J Murata,E Stenlund,Y Morino,T L Thomas,A Dion,S Bathe,T C Awes,B Azmoun,K Imai,T Kempel,A Veicht,P W Stankus,N Grau,A Kozlov,L A Linden Levy,I Nakagawa,S D Rolnick,H Gong,F Kajihara,C Pinkenburg,M L Brooks,M Grosse Perdekamp,M Slunečka,A Berdnikov,S Afanasiev,I Tserruya,H Masui,J H Kang,A Deshpande,Y Riabov,D Jouan,Y Onuki,G R Young,E J Desmond,Y Tsuchimoto,M Naglis,T Hester,E Vazquez-Zambrano,J S Haggerty,M I Nagy,J C Hill,Y I Makdisi,Z Fraenkel,T Engelmore,D Winter,I Danchev,N N Ajitanand,A V Kazantsev,S Dairaku,A Yanovich,M Konno,R K Choudhury,A Taketani,J E Frantz,D Ivanischev,V Papavassiliou,M J Leitch,Y Nakamiya,L Baksay,M Wysocki,H Valle,B Meredith,K M Kijima,D S Jumper,D Kotchetkov,K Das,I Shein,B M Johnson,J Ying,A Král,W E Sondheim,P Tarján,R Pak,A K Purwar,S Sawada,R P Pisani,M Togawa,A Durum,A Drees,E Leitner,S H Kim,I Younus,R Yang,A Isupov,A Enokizono,E T Atomssa,P Liebing,D Kawall,N Kamihara,M A L Leite,Y Tanaka,H W Van Hecke,C P Singh,V Baublis,F Matathias,T K Hemmick,G Baksay,Y Aramaki,Y Ikeda,L Kochenda,O Drapier,A Bazilevsky,Y Akiba,L Tomášek,R Ichimiya,R Seidl,G Roche,S Butsyk,M Issah,J Sziklai,B Bassalleck,R Lacey,A Lebedev,I Garishvili,V Cianciolo,G David,D Isenhower,S Zhou,M Rosati,K Sakashita,C L Woody,K Shoji,S F Pate,S Kametani,S Tarafdar,R A Soltz,T V Moukhanova,J Hamblen,H Al-Bataineh,R Luechtenborg,H Pereira,H Themann,I J Choi,Y Berdnikov,B Love,D Hornback,M Heffner,W Holzmann,S P Stoll,C A Ogilvie,K Sedgwick,K A Drees,J G Lajoie,E Richardson,O Dietzsch,W A Zajc,E P Hartouni,E Kim,A Milov,A Malakhov,V Pantuev,D P Morrison,A Khanzadeev,J Rak,J P Wessels ,M Kawashima,H En’yo ,H Liu,M Shimomura,V Vrba,Yue Shi Lai ,S Fokin ,A Nyanin ,C Muñoz Camacho ,T A Shibata ,E Kinney,W J Park,Z Y You ,J Jia,T Nakamura,M Mishra,Yoshio Yamaguchi ,A C Mignerey,S Huang,T Sato,M Ishihara,M Inaba,L Zolin,M Nguyen,C H Chen ,K B Lee,Y Mao,W Xie,А Виноградов ,R Vértesi,P Constantin,N A Sparks,T Sakaguchi,A Basye ,S P Sørensen ,Kazuo Aoki ,X He,H Torii,S K Park,K Yamaura,C A Rosen,A K Mohanty,S White ,X Li,R Han,Jeongsu Bok ,D Yu Peressounko,C L Silva,M Hohlmann,P Rosnet,K S Joo,P Shukla,Mei Bai ,R Nouicer,J Kamin,H Hamagaki,A Semenov ,B Jacak ,E J Kim ,H Qu,J C Peng ,Y Miake,K Watanabe,T Csörgõ ,M L Purschke,V Riabov,M Csanád,C Y ,C Maguire ,X R Wang,N Saito,Y Kwon,K Ozawa,J T Mitchell,Y J Kim ,K Reygers,S Greene ,R Wei,M Oka,K I Hahn,T Gunji,С Беликов ,J M Durham,A M Sickles ,Z H Citron ,B Hong,J Park,H Pei,Á Kiss,H.-Å Gustafsson,R M Wright,F Ellinghaus,D Dutta,G J Kunde,Daisuke Watanabe ,J Jin,A Morreale,S Oda ,S Edwards,D Silvermyr,K Homma,A Öskarsson ,M Finger,T Chujo,M Kurosawa,M Connors,P Christiansen,B I Kim,F Fleuret,A Rakotozafindrabe,E O’brien ,J Kapustinsky,R Hayano,S Campbell,V Samsonov,T Dahms,Y V Efremenko,T Fusayasu,B Lenzi,K Shigaki,S S.e Rosendahl ,E Haslum,С Сано ,H Buesching,R Averbeck,P Rukoyatkin,T Sugitate,J Alexander,C A Aidala ,B Cole ,V Manko ,M D Malik,T Isobe,O Chvála ,M X Liu,A Datta,J Wood ,K Miki,E Mannel,K F Read,A Litvinenko,K Lee,J Lee,D J Kim,P Růžička ,A Glenn,I H Park,D Sharma,C Zhang,K Fujiwara,B K Singh,J Velkovska,M Donadelli,D H Kim

doi:10.1103/physrevc.88.064910

Abstract

The azimuthal anisotropy coefficients v_2 and v_4 of pi^0 and eta mesons are measured in Au+Au collisions at sqrt(s_NN)=200 GeV, as a function of transverse momentum p_T (1-14 GeV/c) and centrality. The extracted v_2 coefficients are found to be consistent between the two meson species over the measured p_T range. The ratio of v_4/v_2^2 for pi^0 mesons is found to be independent of p_T for 1-9 GeV/c, implying a lack of sensitivity of the ratio to the change of underlying physics with p_T. Furthermore, the ratio of v_4/v_2^2 is systematically larger in central collisions, which may reflect the combined effects of fluctuations in the initial collision geometry and finite viscosity in the evolving medium.

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