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Enhancement of the dielectron continuum in $\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions
Authors :
Afanasiev, S. Aidala, C. Ajitanand, N.N. Akiba, Y. Alexander, J. Al-Jamel, A. Aoki, K. Aphecetche, Laurent Armendariz, R. Aronson, S.H. Averbeck, R. Awes, T.C. Azmoun, B. Babintsev, V. Baldisseri, A. Barish, K.N. Barnes, P.D. Bassalleck, B. Bathe, S. Batsouli, S. Baublis, V. Bauer, F. Bazilevsky, A. Belikov, S. Bennett, R. Berdnikov, Y. Bjorndal, M.T. Boissevain, J.G. Borel, H. Boyle, K. Brooks, M.L. Brown, D.S. Bucher, D. Buesching, H. Bumazhnov, V. Bunce, G. Burward-Hoy, J.M. Butsyk, S. Campbell, S. Chai, J.-S. Chernichenko, S. Chiba, J. Chi, C.Y. Chiu, M. Choi, I.J. Chujo, T. Cianciolo, V. Cleven, C.R. Cobigo, Y. Cole, B.A. Comets, M.P. Constantin, P. Csanad, M. Csorgo, T. Dahms, T. Das, K. David, G. Delagrange, H. Denisov, A. D'Enterria, D. Deshpande, A. Desmond, E.J. Dietzsch, O. Dion, A. Drachenberg, J.L. Drapier, O. Drees, A. Dubey, A.K. Durum, A. Dzhordzhadze, V. Efremenko, Y.V. Egdemir, J. Enokizono, A. En'Yo, H. Espagnon, B. Esumi, S. Fields, D.E. Fleuret, F. Fokin, S.L. Forestier, B. Fraenkel, Z. Frantz, J.E. Franz, A. Frawley, A.D. Fukao, Y. Fung, S.-Y. Gadrat, S. Gastineau, F. Germain, Marie Glenn, A. Gonin, M. Gosset, J. Goto, Y. Granier De Cassagnac, R. Grau, N. Greene, S.V. Grosse Perdekamp, M. Gunji, T. Gustafsson, H.-A. Hachiya, T. Hadj Henni, A. Haggerty, J.S. Hagiwara, M.N. Hamagaki, H. Harada, H. Hartouni, E.P. Haruna, K. Harvey, M. Haslum, E. Hasuko, K. Hayano, R. Heffner, M. Hemmick, T.K. Heuser, J.M. He, X. Hiejima, H. Hill, J.C. Hobbs, R. Holmes, M. Holzmann, W. Homma, K. Hong, B. Horaguchi, T. Hur, M.G. Ichihara, T. Imai, K. Inaba, M. Isenhower, D. Isenhower, L. Ishihara, M. Isobe, T. Issah, M. Isupov, A. Jacak, B.V. Jia, J. Jin, J. Jinnouchi, O. Johnson, B.M. Joo, K.S. Jouan, D. Kajihara, F. Kametani, S. Kamihara, N. Kaneta, M. Kang, J.H. Kawagishi, T. Kazantsev, A.V. Kelly, Steven Khanzadeev, A. Kim, D.J. Kim, E. Kim, Y.-S. Kinney, E. Kiss, A. Kistenev, E. Kiyomichi, A. Klein-Boesing, C. Kochenda, L. Kochetkov, V. Komkov, B. Konno, M. Kotchetkov, D. Kozlov, A. Kroon, P.J. Kunde, G.J. Kurihara, N. Kurita, K. Kweon, M.J. Kwon, Y. Kyle, G.S. Lacey, R. Lajoie, J.G. Lebedev, A. Le Bornec, Y. Leckey, S. Lee, D.M. Lee, M.K. Leitch, M.J. Leite, M.A.L. Lim, H. Litvinenko, A. Liu, M.X. Li, X.H. Maguire, C.F. Makdisi, Y.I. Malakhov, A. Malik, M.D. Manko, V.I. Masui, H. Matathias, F. McCain, M.C. McGaughey, P.L. Miake, Y. Miller, T.E. Milov, A. Mioduszewski, S. Mishra, G.C. Mitchell, J.T. Morrison, D.P. Moss, J.M. Moukhanova, T.V. Mukhopadhyay, D. Murata, J. Nagamiya, S. Nagata, Y. Nagle, J.L. Naglis, M. Nakamura, T. Newby, J. Nguyen, M. Norman, B.E. Nyanin, A.S. Nystrand, J. O'Brien, E. Ogilvie, C.A. Ohnishi, H. Ojha, I.D. Okada, H. Okada, K. Omiwade, O.O. Oskarsson, A. Otterlund, I. Ozawa, K. Pal, D. Palounek, A.P.T. Pantuev, V. Papavassiliou, V. Park, J. Park, W.J. Pate, S.F. Pei, H. Peng, J.-C. Pereira, H. Peresedov, V. Peressounko, D.Yu. Pinkenburg, C. Pisani, R.P. Purschke, M.L. Purwar, A.K. Qu, H. Rak, J. Ravinovich, I. Read, K.F. Reuter, M. Reygers, K. Riabov, V. Riabov, Y. Roche, G. Romana, A. Rosati, M. Rosendahl, S.S.E. Rosnet, P. Rukoyatkin, P. Rykov, V.L. Ryu, S.S. Sahlmueller, B. Saito, N. Sakaguchi, T. Sakai, S. Samsonov, V. Sato, H.D. Sato, S. Sawada, S. Semenov, V. Seto, R. Sharma, D. Shea, T.K. Shein, I. Shibata, T.-A. Shigaki, K. Shimomura, M. Shohjoh, T. Shoji, K. Sickles, A. Silva, C.L. Silvermyr, D. Sim, K.S. Singh, C.P. Singh, V. Skutnik, S. Smith, W.C. Soldatov, A. Soltz, R.A. Sondheim, W.E. Sorensen, S.P. Sourikova, I.V. Staley, F. Stankus, P.W. Stenlund, E. Stepanov, M. Ster, A. Stoll, S.P. Sugitate, T. Suire, C. Sullivan, J.P. Sziklai, J. Tabaru, T. Takagi, S. Takagui, E.M. Taketani, A. Tanaka, K.H. Tanaka, Y. Tanida, K. Tannenbaum, M.J. Taranenko, A. Tarjan, P. Thomas, T.L. Togawa, M. Toia, A. Tojo, J. Torii, H. Towell, R.S. Tram, V.-N. Tserruya, I. Tsuchimoto, Y. Tuli, S.K. Tydesjo, H. Tyurin, N. Valle, H. Vanhecke, H.W. Velkovska, J. Vertesi, R. Vinogradov, A.A. Vznuzdaev, E. Wagner, M. Wang, X.R. Watanabe, Y. Wessels, J. White, S.N. Willis, N. Winter, D. Woody, C.L. Wysocki, M. Xie, W. Yanovich, A. Yokkaichi, S. Young, G.R. Younus, I. Yushmanov, I.E. Zajc, W.A. Zaudtke, O. Zhang, C. Zimanyi, J. Zolin, L. Laboratoire SUBATECH Nantes (SUBATECH) Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Institut de Physique Nucléaire d'Orsay (IPNO) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Leprince-Ringuet (LLR) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) PHENIX Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes) Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11) Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Publication Year :
2007
Publisher :
HAL CCSD, 2007.
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.<br />344 authors from 52 institutions, 7 pages, 4 figures. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
Details
Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....6c5de719c2c475cce9e18e44f629f5e6