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Enhancement of the dielectron continuum in $\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions

S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba J. Alexander A. Al-Jamel K. Aoki Laurent Aphecetche 1 R. Armendariz S.H. Aronson R. Averbeck T.C. Awes B. 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 M.T. Bjorndal J.G. Boissevain H. Borel 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 S. Chernichenko J. Chiba C.Y. Chi M. Chiu I.J. Choi T. Chujo V. Cianciolo C.R. Cleven Y. Cobigo B.A. Cole M.P. Comets 2 P. Constantin M. Csanad T. Csorgo T. Dahms K. Das G. David H. Delagrange 1 A. Denisov D. d'Enterria A. Deshpande E.J. Desmond O. Dietzsch A. Dion J.L. Drachenberg O. Drapier 3 A. Drees A.K. Dubey A. Durum V. Dzhordzhadze Y.V. Efremenko J. Egdemir A. Enokizono H. En'Yo B. Espagnon 2 S. Esumi D.E. Fields F. Fleuret 3 S.L. Fokin B. Forestier Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley Y. Fukao S.-Y. Fung S. Gadrat 4 F. Gastineau 1 Marie Germain 1 A. Glenn M. Gonin 3 J. Gosset Y. Goto R. Granier de Cassagnac 3 N. Grau S.V. Greene M. Grosse Perdekamp T. Gunji H.-A. Gustafsson T. Hachiya A. Hadj Henni 1 J.S. Haggerty M.N. Hagiwara H. Hamagaki H. Harada E.P. Hartouni K. Haruna M. Harvey E. Haslum K. Hasuko R. Hayano M. Heffner T.K. Hemmick J.M. Heuser X. He H. Hiejima J.C. Hill R. Hobbs M. Holmes W. Holzmann K. Homma B. Hong T. Horaguchi M.G. Hur T. Ichihara K. Imai M. Inaba 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 2 F. Kajihara S. Kametani N. Kamihara M. Kaneta J.H. Kang T. Kawagishi A.V. Kazantsev Steven Kelly A. Khanzadeev D.J. Kim E. Kim Y.-S. Kim E. Kinney A. Kiss E. Kistenev A. Kiyomichi C. Klein-Boesing L. Kochenda V. Kochetkov B. Komkov M. Konno D. Kotchetkov A. Kozlov P.J. Kroon G.J. Kunde N. Kurihara K. Kurita M.J. Kweon Y. Kwon G.S. Kyle R. Lacey J.G. Lajoie A. Lebedev Y. Le Bornec 2 S. Leckey D.M. Lee M.K. Lee M.J. Leitch M.A.L. Leite H. Lim A. Litvinenko M.X. Liu X.H. Li C.F. Maguire Y.I. Makdisi A. Malakhov M.D. Malik V.I. Manko H. Masui F. Matathias M.C. Mccain P.L. Mcgaughey Y. Miake T.E. Miller A. Milov S. Mioduszewski G.C. Mishra J.T. Mitchell D.P. Morrison J.M. Moss T.V. Moukhanova D. Mukhopadhyay J. Murata S. Nagamiya Y. Nagata J.L. Nagle M. Naglis T. Nakamura J. Newby M. Nguyen B.E. Norman A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha H. Okada K. Okada O.O. Omiwade A. Oskarsson I. Otterlund K. Ozawa 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 V. Peresedov D.Yu. Peressounko C. Pinkenburg R.P. Pisani 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 B. Sahlmueller N. Saito T. Sakaguchi S. Sakai V. Samsonov H.D. Sato S. Sato S. Sawada V. Semenov R. Seto D. Sharma T.K. Shea I. Shein T.-A. Shibata K. Shigaki M. Shimomura T. Shohjoh K. Shoji A. Sickles C.L. Silva D. Silvermyr K.S. Sim C.P. Singh V. Singh 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 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 H. Torii R.S. Towell V.-N. Tram 1, 3 I. Tserruya Y. Tsuchimoto S.K. Tuli H. Tydesjo N. Tyurin H. Valle H.W. Vanhecke J. Velkovska R. Vertesi A.A. Vinogradov E. Vznuzdaev M. Wagner X.R. Wang Y. Watanabe J. Wessels S.N. White N. Willis 2 D. Winter C.L. Woody M. Wysocki W. Xie A. Yanovich S. Yokkaichi G.R. Young I. Younus I.E. Yushmanov W.A. Zajc O. Zaudtke C. Zhang J. Zimanyi L. Zolin
Abstract : The PHENIX experiment has measured the dielectron continuum in sqrt{s_NN} = 200 GeV Au+Au collisions. In minimum bias collisions the dielectron yield in the mass range between 150 and 750 MeV/c^2 is enhanced by a factor of 3.4 +/- 0.2(stat.) +/- 1.3(syst.) +/- 0.7(model) compared to the expectation from our model of hadron decays. The integrated yield increases faster with the centrality of the collisions than the number of participating nucleons, suggesting emission from scattering processes in the hot and dense medium. The continuum yield between the masses of the phi and the J/psi mesons is consistent with expectations from correlated c-cbar production, though other mechanisms are not ruled out.
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http://hal.in2p3.fr/in2p3-00156495
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Submitted on : Thursday, June 21, 2007 - 1:00:47 PM
Last modification on : Friday, November 13, 2020 - 9:12:25 AM

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  • HAL Id : in2p3-00156495, version 1
  • ARXIV : 0706.3034

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S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, J. Alexander, et al.. Enhancement of the dielectron continuum in $\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions. 2007. ⟨in2p3-00156495⟩

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