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Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV

A. Adare S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander A. Al-Jamel K. Aoki Laurent Aphecetche 1 R. Armendariz S.H. Aronson J. Asai E. T. Atomssa 2 R. Averbeck T.C. Awes B. Azmoun V. Babintsev G. Baksay L. Baksay A. Baldisseri 3 K.N. Barish P.D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis F. Bauer A. Bazilevsky S. Belikov R. Bennett Y. Berdnikov A.A. Bickley M.T. Bjorndal J.G. Boissevain H. Borel 3 K. Boyle M.L. Brooks D.S. Brown D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk S. Campbell J.-S. Chai B.S. Chang J.-L. Charvet 3 S. Chernichenko J. Chiba C.Y. Chi M. Chiu I.J. Choi T. Chujo P. Chung A. Churyn V. Cianciolo C.R. Cleven Y. Cobigo 3 B.A. Cole M.P. Comets 4 P. Constantin M. Csanad T. Csorgo T. Dahms K. Das G. David M.B. Deaton K. Dehmelt H. Delagrange 1 A. Denisov D. d'Enterria A. Deshpande E.J. Desmond O. Dietzsch A. Dion M. Donadelli J.L. Drachenberg O. Drapier 2 A. Drees A.K. Dubey A. Durum V. Dzhordzhadze Y.V. Efremenko J. Egdemir F. Ellinghaus W.S. Emam A. Enokizono H. En'Yo B. Espagnon 4 S. Esumi K.O. Eyser D.E. Fields M. Finger F. Fleuret 2 S.L. Fokin B. Forestier Z. Fraenkel J.E. Frantz A. Franz J. Franz A.D. Frawley K. Fujiwara Y. Fukao S.-Y. Fung T. Fusayasu S. Gadrat 5 I. Garishvili F. Gastineau 1 Marie Germain 1 A. Glenn H. Gong M. Gonin 2 J. Gosset 3 Y. Goto R. Granier de Cassagnac 2 N. Grau S.V. Greene M. Grosse Perdekamp T. Gunji H.-A. Gustafsson T. Hachiya A. Hadj Henni 1 C. Haegemann J.S. Haggerty M.N. Hagiwara H. Hamagaki R. Han H. Harada E.P. Hartouni K. Haruna M. Harvey E. Haslum K. Hasuko R. Hayano M. Heffner T.K. Hemmick T. Hester J.M. Heuser X. He H. Hiejima J.C. Hill R. Hobbs M. Hohlmann M. Holmes W. Holzmann K. Homma B. Hong T. Horaguchi D. Hornback M.G. Hur T. Ichihara K. Imai M. Inaba Y. Inoue D. Isenhower L. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov B.V. Jacak J. Jia J. Jin O. Jinnouchi B.M. Johnson K.S. Joo D. Jouan 4 F. Kajihara S. Kametani N. Kamihara J. Kamin M. Kaneta J.H. Kang H. Kanoh H. Kano T. Kawagishi D. Kawall A.V. Kazantsev Steven Kelly A. Khanzadeev J. Kikuchi D.H. Kim D.J. Kim E. Kim Y.-S. Kim E. Kinney A. Kiss E. Kistenev A. Kiyomichi J. Klay C. Klein-Boesing L. Kochenda V. Kochetkov B. Komkov M. Konno D. Kotchetkov A. Kozlov A. Kral A. Kravitz P.J. Kroon J. Kubart G.J. Kunde N. Kurihara K. Kurita M.J. Kweon Y. Kwon G.S. Kyle R. Lacey Y.-S. Lai J.G. Lajoie A. Lebedev Y. Le Bornec 4 S. Leckey D.M. Lee M.K. Lee T. Lee M.J. Leitch M.A.L. Leite B. Lenzi H. Lim T. Liska A. Litvinenko M.X. Liu X. Li X.H. Li B. Love D. Lynch C.F. Maguire Y.I. Makdisi A. Malakhov M.D. Malik V.I. Manko Y. Mao L. Masek H. Masui F. Matathias M.C. Mccain M. Mccumber P.L. Mcgaughey Y. Miake P. Mikes K. Miki T.E. Miller A. Milov S. Mioduszewski G.C. Mishra M. Mishra J.T. Mitchell M. Mitrovski A. Morreale D.P. Morrison J.M. Moss T.V. Moukhanova D. Mukhopadhyay J. Murata S. Nagamiya Y. Nagata J.L. Nagle M. Naglis I. Nakagawa Y. Nakamiya T. Nakamura K. Nakano J. Newby M. Nguyen B.E. Norman A.S. Nyanin J. Nystrand E. O'Brien S.X. Oda C.A. Ogilvie H. Ohnishi I.D. Ojha K. Okada M. Oka O.O. Omiwade A. Oskarsson L. Otterlund M. Ouchida K. Ozawa R. Pak D. Pal A.P.T. Palounek V. Pantuev V. Papavassiliou J. Park W.J. Park S.F. Pate H. Pei J.-C. Peng H. Pereira 3 V. Peresedov D.Yu. Peressounko C. Pinkenburg R.P. Pisani M.L. Purschke A.K. Purwar H. Qu J. Rak A. Rakotozafindrabe 2 I. Ravinovich K.F. Read S. Rembeczki M. Reuter K. Reygers V. Riabov Y. Riabov G. Roche 5 A. Romana 2 M. Rosati S.S.E. Rosendahl P. Rosnet 5 P. Rukoyatkin V.L. Rykov S.S. Ryu B. Sahlmueller N. Saito T. Sakaguchi S. Sakai H. Sakata V. Samsonov H.D. Sato S. Sato S. Sawada J. Seele R. Seidl V. Semenov R. Seto D. Sharma T.K. Shea I. Shein A. Shevel T.-A. Shibata K. Shigaki M. Shimomura T. Shohjoh K. Shoji A. Sickles C.L. Silva D. Silvermyr C. Silvestre 3 K.S. Sim C.P. Singh V. Singh S. Skutnik M. Slunecka W.C. Smith A. Soldatov R.A. Soltz W.E. Sondheim S.P. Sorensen I.V. Sourikova F. Staley 3 P.W. Stankus E. Stenlund M. Stepanov A. Ster S.P. Stoll T. Sugitate C. Suire 4 J. Sziklai T. Tabaru S. Takagi E.M. Takagui A. Taketani K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum A. Taranenko P. Tarjan T.L. Thomas M. Togawa A. Toia J. Tojo L. Tomasek H. Torii R.S. Towell V.-N. Tram 2 I. Tserruya Y. Tsuchimoto S.K. Tuli H. Tydesjo N. Tyurin C. Vale H. Valle H.W. van Hecke J. Velkovska R. Vertesi A.A. Vinogradov M. Virius V. Vrba E. Vznuzdaev M. Wagner D. Walker X.R. Wang Y. Watanabe J. Wessels S.N. White N. Willis 4 D. Winter C.L. Woody M. Wysocki W. Xie Y. Yamaguchi A. Yanovich Z. Yasin J. Ying S. Yokkaichi G.R. Young I. Younus I.E. Yushmanov W.A. Zajc O. Zaudtke C. Zhang S. Zhou J. Zimanyi L. Zolin
Abstract : The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured electrons from heavy flavor (charm and bottom) decays for 0.3 < p_T < 9 GeV/c at midrapidity (|y| < 0.35) in Au+Au collisions at sqrt(s_NN) = 200 GeV. The nuclear modification factor RAA relative to p+p collisions shows a strong suppression in central Au+Au collisions, indicating substantial energy loss of heavy quarks in the medium produced at RHIC. A large azimuthal anisotropy, v_2, with respect to the reaction plane is observed for 0.5 < p_T < 5 GeV/c indicating non-zero heavy flavor elliptic flow. A simultaneous description of RAA(p_T) and v2(p_T) constrains the existing models of heavy-quark rescattering in strongly interacting matter and provides information on the transport properties of the produced medium. In particular, a viscosity to entropy density ratio close to the conjectured quantum lower bound, i.e. near a perfect fluid, is suggested.
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Submitted on : Tuesday, December 5, 2006 - 12:21:38 PM
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A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at $\sqrt{s_{NN}}$ = 200 GeV. Physical Review Letters, American Physical Society, 2007, 98, pp.172301. ⟨10.1103/PhysRevLett.98.172301⟩. ⟨in2p3-00118439⟩

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