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Saturation of azimuthal anisotropy in Au + Au collisions at sqrt(s_NN) = 62 - 200 GeV

S.S. Adler S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba A. Al-Jamel J. Alexander R. Amirikas K. Aoki Laurent Aphecetche 1 R. Armendariz S.H. Aronson R. Averbeck T.C. Awes B. Azmoun R. Azmoun V. Babintsev A. Baldisseri K.N. Barish P.D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis F. Bauer A. Bazilevsky S. Belikov R. Bennett Y. Berdnikov S. Bhagavatula M.T. Bjorndal J.G. Boissevain H. Borel S. Borenstein K. Boyle M.L. Brooks D.S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk X. Camard S. Campbell J.-S. Chai P. Chand W.C. Chang S. Chernichenko C.Y. Chi J. Chiba M. Chiu I.J. Choi J. Choi R.K. Choudhury T. Chujo V. Cianciolo C.R. Cleven Y. Cobigo B.A. Cole M.P. Comets 2 P. Constantin M. Csanad T. Csorgo D. d'Enterria T. Dahms K. Das G. David H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond A. Devismes O. Dietzsch A. Dion J.L. Drachenberg O. Drapier 3 A. Drees K.A. Drees A.K. Dubey R. Du Rietz A. Durum D. Dutta V. Dzhordzhadze Y.V. Efremenko J. Egdemir K. El Chenawi A. Enokizono H. En'Yo B. Espagnon 2 S. Esumi L. Ewell D.E. Fields F. Fleuret 3 S.L. Fokin B. Forestier 4 B.D. Fox Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley Y. Fukao S.-Y. Fung S. Gadrat 4 S. Garpman F. Gastineau Marie Germain 1 T.K. Ghosh A. Glenn G. Gogiberidze M. Gonin 3 J. Gosset Y. Goto R. Granier de Cassagnac 3 N. Grau S.V. Greene M. Grosse Perdekamp T. Gunji W. Guryn H.-A. Gustafsson T. Hachiya A. Hadjhenni J.S. Haggerty M.N. Hagiwara H. Hamagaki A.G. Hansen H. Harada E.P. Hartouni K. Haruna M. Harvey E. Haslum K. Hasuko R. Hayano N. Hayashi X. He M. Heffner T.K. Hemmick J.M. Heuser M. Hibino H. Hiejima J.C. Hill R. Hobbs M. Holmes W. Holzmann K. Homma B. Hong A. Hoover T. Horaguchi H.M. Hur T. Ichihara V.V. Ikonnikov K. Imai M. Inaba D. Isenhower L. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov B.V. Jacak W.Y. Jang Y. Jeong J. Jia J. Jin O. Jinnouchi B.M. Johnson S.C. Johnson K.S. Joo D. Jouan 2 F. Kajihara S. Kametani N. Kamihara M. Kaneta J.H. Kang S.S. Kapoor K. Katou T. Kawagishi A.V. Kazantsev Steven Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D.H. Kim D.J. Kim D.W. Kim E. Kim G.-B. Kim 3 H.J. Kim Y.-S. Kim E. Kinney W.W. Kinnison A. Kiss E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov D. Koehler T. Kohama B. Komkov M. Konno M. Kopytine D. Kotchetkov A. Kozlov P.J. Kroon C.H. Kuberg G.J. Kunde N. Kurihara K. Kurita Y. Kuroki M.J. Kweon Y. Kwon G.S. Kyle R. Lacey V. Ladygin J.G. Lajoie Y. Le Bornec 2 A. Lebedev S. Leckey D.M. Lee M.K. Lee S. Lee M.J. Leitch M.A.L. Leite X.H. Li H. Lim A. Litvinenko M.X. Liu Yehan Liu C.F. Maguire Y.I. Makdisi A. Malakhov M.D. Malik V.I. Manko Y. Mao Gines Martinez Garcia 1 M.D. Marx H. Masui F. Matathias T. Matsumoto M.C. Mccain P.L. Mcgaughey E. Melnikov F. Messer Y. Miake J. Milan T.E. Miller A. Milov S. Mioduszewski R.E. Mischke G.C. Mishra J.T. Mitchell A.K. Mohanty D.P. Morrison J.M. Moss T.V. Moukhanova F. Muhlbacher D. Mukhopadhyay M. Muniruzzaman J. Murata S. Nagamiya Y. Nagata J.L. Nagle M. Naglis T. Nakamura B.K. Nandi M. Nara J. Newby M. Nguyen P. Nilsson B. Norman A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha H. Okada K. Okada O.O. Omiwade M. Ono V. Onuchin A. Oskarsson I. Otterlund K. Oyama K. Ozawa D. Pal A.P.T. Palounek V. Pantuev V. Papavassiliou J. Park W.J. Park A. Parmar S.F. Pate H. Pei T. Peitzmann J.-C. Peng H. Pereira V. Peresedov D.Yu. Peressounko C. Pinkenburg R.P. Pisani F. Plasil M.L. Purschke A.K. Purwar H. Qu J. Rak I. Ravinovich K.F. Read M. Reuter K. Reygers V. Riabov Y. Riabov G. Roche 4 A. Romana 3 M. Rosati S.S.E. Rosendahl P. Rosnet 4 P. Rukoyatkin V.L. Rykov S.S. Ryu M.E. Sadler B. Sahlmueller N. Saito T. Sakaguchi M. Sakai S. Sakai V. Samsonov L. Sanfratello R. Santo H.D. Sato S. Sato S. Sawada Y. Schutz V. Semenov R. Seto D. Sharma M.R. Shaw T.K. Shea I. Shein T.-A. Shibata K. Shigaki T. Shiina M. Shimomura T. Shohjoh A. Sickles C.L. Silva D. Silvermyr K.S. Sim J. Simon-Gillo C.P. Singh V. Singh M. Sivertz S. Skutnik W.C. Smith A. Soldatov R.A. Soltz W.E. Sondheim S.P. Sorensen I.V. Sourikova F. Staley P.W. Stankus E. Stenlund M. Stepanov A. Ster S.P. Stoll T. Sugitate C. Suire 2 J.P. Sullivan K. Syoji J. Sziklai T. Tabaru S. Takagi E.M. Takagui A. Taketani M. Tamai K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum A. Taranenko P. Tarjan J.D. Tepe T.L. Thomas M. Togawa J. Tojo H. Torii R.S. Towell V.-N. Tram 3 I. Tserruya Y. Tsuchimoto H. Tsuruoka S.K. Tuli H. Tydesjo N. Tyurin H. Valle H.W. van Hecke J. Velkovska M. Velkovsky R. Vertesi V. Veszpremi L. Villatte A.A. Vinogradov M.A. Volkov E. Vznuzdaev M. Wagner X.R. Wang Y. Watanabe J. Wessels S.N. White N. Willis 2 D. Winter F.K. Wohn C.L. Woody M. Wysocki W. Xie Y. Yang A. Yanovich S. Yokkaichi G.R. Young I. Younus I.E. Yushmanov W.A. Zajc O. Zaudkte C. Zhang S. Zhou S.J. Zhou J. Zimanyi L. Zolin
Abstract : New measurements are presented for charged hadron azimuthal correlations at mid-rapidity in Au+Au collisions at sqrt(s_NN) = 62.4 and 200 GeV. They are compared to earlier measurements obtained at sqrt(s_NN) = 130 GeV and in Pb+Pb collisions at sqrt(s_NN) = 17.2 GeV. Sizeable anisotropies are observed with centrality and transverse momentum (p_T) dependence characteristic of elliptic flow (v_2). For a broad range of centralities, the observed magnitudes and trends of the differential anisotropy, v_2(p_T), change very little over the collision energy range sqrt(s_NN) = 62-200 GeV, indicating saturation of the excitation function for v_2 at these energies. Such a saturation may be indicative of the dominance of a very soft equation of state for sqrt(s_NN) = 62-200 GeV.
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Submitted on : Tuesday, January 11, 2005 - 12:52:01 PM
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S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Saturation of azimuthal anisotropy in Au + Au collisions at sqrt(s_NN) = 62 - 200 GeV. Physical Review Letters, American Physical Society, 2005, 94, 232302 (6p.). ⟨10.1103/PhysRevLett.94.232302⟩. ⟨in2p3-00023544⟩

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