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J/Psi Production in Au-Au Collisions at sqrt(s_NN) = 200 GeV at the Relativistic Heavy Ion Collider

S.S. Adler S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba J. Alexander R. Amirikas Laurent Aphecetche 1 S.H. Aronson R. Averbeck T.C. Awes R. Azmoun V. Babintsev A. Baldisseri K.N. Barish P.D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J.G. Boissevain H. Borel S. Borenstein M.L. Brooks D.S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk X. Camard 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 Y. Cobigo B.A. Cole P. Constantin G. d'Enterria G. David H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond O. Dietzsch O. Drapier 2 A. Drees R. Du Rietz A. Durum D. Dutta Y.V. Efremenko K. El Chenawi A. Enokizono H. Enyo S. Esumi L. Ewell D.E. Fields F. Fleuret 2 S.L. Fokin B.D. Fox Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley S.Y. Fung S. Garpman T.K. Ghosh A. Glenn G. Gogiberidze M. Gonin 2 J. Gosset Y. Goto R. Granier de Cassagnac 2 N. Grau S.V. Greene M. Grosse Perdekamp W. Guryn H.A. Gustafsson T. Hachiya J.S. Haggerty H. Hamagaki A.G. Hansen E.P. Hartouni M. Harvey R. Hayano X. He M. Heffner T.K. Hemmick J.M. Heuser M. Hibino J.C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V.V. Ikonnikov K. Imai L.D. Isenhower M. Ishihara M. Issah A. Isupov B.V. Jacak W.Y. Jang Y. Jeong J. Jia O. Jinnouchi B.M. Johnson S.C. Johnson K.S. Joo D. Jouan 3 S. Kametani N. Kamihara J.H. Kang S.S. Kapoor K. Katou Steven Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D.H. Kim D.J. Kim D.W. Kim E. Kim G.B. Kim 2 H.J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov D. Koehler T. Kohama M. Kopytine D. Kotchetkov A. Kozlov P.J. Kroon C.H. Kuberg K. Kurita Y. Kuroki M.J. Kweon Y. Kwon G.S. Kyle R. Lacey V. Ladygin J.G. Lajoie A. Lebedev S. Leckey D.M. Lee S. Lee M.J. Leitch X.H. Li H. Lim A. Litvinenko M.X. Liu Yehan Liu C.F. Maguire Y.I. Makdisi A. Malakhov V.I. Manko Y. Mao Gines Martinez Garcia 1 M.D. Marx H. Masui F. Matathias T. Matsumoto 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 F. Muhlbacher D. Mukhopadhyay M. Muniruzzaman J. Murata S. Nagamiya J.L. Nagle T. Nakamura B.K. Nandi M. Nara J. Newby P. Nilsson A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha K. Okada M. Ono V. Onuchin A. Oskarsson I. Otterlund K. Oyama K. Ozawa D. Pal A.P.T. Palounek V.S. Pantuev V. Papavassiliou J. Park A. Parmar S.F. Pate T. Peitzmann J.C. Peng V. Peresedov C. Pinkenburg R.P. Pisani F. Plasil M.L. Purschke A. Purwar J. Rak I. Ravinovich K.F. Read M. Reuter K. Reygers V. Riabov Y. Riabov G. Roche 4 A. Romana 2 M. Rosati P. Rosnet 4 S.S. Ryu M.E. Sadler 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 M.R. Shaw T.K. Shea T.A. Shibata K. Shigaki T. Shiina C.L. Silva D. Silvermyr K.S. Sim C.P. Singh V. Singh M. Sivertz 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 J.P. Sullivan E.M. Takagui A. Taketani M. Tamai K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum P. Tarjan J.D. Tepe T.L. Thomas J. Tojo H. Torii R.S. Towell I. Tserruya H. Tsuruoka S.K. Tuli H. Tydesjo N. Tyurin H.W. van Hecke J. Velkovska M. Velkovsky L. Villatte A.A. Vinogradov M.A. Volkov E. Vznuzdaev X.R. Wang Y. Watanabe S.N. White F.K. Wohn C.L. Woody W. Xie Y. Yang A. Yanovich S. Yokkaichi G.R. Young I.E. Yushmanov W.A. Zajc C. Zhang S. Zhou L. Zolin Phenix Collaboration
Abstract : First results on charm quarkonia production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The yield of J/Psi's measured in the PHENIX experiment via electron-positron decay pairs at mid-rapidity for Au-Au reactions at sqrt(s_NN) = 200 GeV are analyzed as a function of collision centrality. For this analysis we have studied 49.3 million minimum bias Au-Au reactions. We present the J/Psi invariant yield dN/dy for peripheral and mid-central reactions. For the most central collisions where we observe no signal above background, we quote 90% confidence level upper limits. We compare these results with our J/Psi measurement from proton-proton reactions at the same energy. We find that our measurements are not consistent with models that predict strong enhancement relative to binary collision scaling.
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Submitted on : Monday, January 24, 2005 - 11:59:05 AM
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S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. J/Psi Production in Au-Au Collisions at sqrt(s_NN) = 200 GeV at the Relativistic Heavy Ion Collider. Physical Review C, American Physical Society, 2004, 69, pp.014901. ⟨10.1103/PhysRevC.69.014901⟩. ⟨in2p3-00023627⟩

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