/ Experiment-Nucl arXiv:0804.4168


Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature


Adare, A. (Colorado U.) ; Afanasiev, S. (Dubna, JINR) ; Aidala, C. (Nevis Labs, Columbia U.) ; Ajitanand, N.N. (SUNY, Stony Brook, Chem. Dept.) ; Akiba, Y. (RIKEN BNL) ; Al-Bataineh, H. (New Mexico State U.) ; Alexander, J. (SUNY, Stony Brook, Chem. Dept.) ; Al-Jamel, A. (New Mexico State U.) ; Aoki, K. (Wako, RIKEN) ; Aphecetche, L. (SUBATECH, Nantes) ; Armendariz, R. (New Mexico State U.) ; Aronson, S.H. (Brookhaven) ; Asai, J. (RIKEN BNL) ; Atomssa, E.T. (Ecole Polytechnique) ; Averbeck, R. (SUNY, Stony Brook) ; Awes, T.C. (Oak Ridge) ; Azmoun, B. (Brookhaven) ; Babintsev, V. (Serpukhov, IHEP) ; Baksay, G. (Florida Inst. Tech.) ; Baksay, L. (Florida Inst. Tech.) ; Baldisseri, A. (DAPNIA, Saclay) ; Barish, K.N. (UC, Riverside) ; Barnes, P.D. (Los Alamos) ; Bassalleck, B. (New Mexico U.) ; Bathe, S. (UC, Riverside) ; Batsouli, S. (Oak Ridge) ; Baublis, V. (St. Petersburg, INP) ; Bauer, F. (UC, Riverside) ; Bazilevsky, A. (Brookhaven) ; Belikov, S. (Iowa State U.) ; Bennett, R. (SUNY, Stony Brook) ; Berdnikov, Y. (St. Petersburg Polytechnic Inst.) ; Bickley, A.A. (Colorado U.) ; Bjorndal, M.T. (Nevis Labs, Columbia U.) ; Boissevain, J.G. (Los Alamos) ; Borel, H. (DAPNIA, Saclay) ; Boyle, K. (SUNY, Stony Brook) ; Brooks, M.L. (Los Alamos) ; Brown, D.S. (New Mexico State U.) ; Bucher, D. (Munster U.) ; Buesching, H. (Brookhaven) ; Bumazhnov, V. (Serpukhov, IHEP) ; Bunce, G. (RIKEN BNL) ; Burward-Hoy, J.M. (Los Alamos) ; Butsyk, S. (SUNY, Stony Brook) ; Campbell, S. (SUNY, Stony Brook) ; Chai, J.-S. (KAERI, Taejon) ; Chang, B.S. (IPAP, Seoul) ; Charvet, J.-L. (DAPNIA, Saclay) ; Chernichenko, S. (Serpukhov, IHEP) ; Chiba, J. (KEK, Tsukuba) ; Chi, C.Y. (Nevis Labs, Columbia U.) ; Chiu, M. (Illinois U., Urbana) ; Choi, I.J. (IPAP, Seoul) ; Chujo, T. (Vanderbilt U.) ; Chung, P. (SUNY, Stony Brook, Chem. Dept.) ; Churyn, A. (Serpukhov, IHEP) ; Cianciolo, V. (Oak Ridge) ; Cleven, C.R. (Georgia State U.) ; Cobigo, Y. (DAPNIA, Saclay) ; Cole, B.A. (Nevis Labs, Columbia U.) ; Comets, M.P. (Orsay, IPN) ; Constantin, P. (Los Alamos) ; Csanad, M. (Eotvos U.) ; Csorgo, T. (Budapest, RMKI) ; Dahms, T. (SUNY, Stony Brook) ; Das, K. (Florida State U.) ; David, G. (Brookhaven) ; Deaton, M.B. (Abilene Christian U.) ; Dehmelt, K. (Florida Inst. Tech.) ; Delagrange, H. (SUBATECH, Nantes) ; Denisov, A. (Serpukhov, IHEP) ; d'Enterria, D. (Nevis Labs, Columbia U.) ; Deshpande, A. (SUNY, Stony Brook) ; Desmond, E.J. (Brookhaven) ; Dietzsch, O. (Sao Paulo U.) ; Dion, A. (SUNY, Stony Brook) ; Donadelli, M. (Sao Paulo U.) ; Drachenberg, J.L. (Abilene Christian U.) ; Drapier, O. (Ecole Polytechnique) ; Drees, A. (SUNY, Stony Brook) ; Dubey, A.K. (Weizmann Inst.) ; Durum, A. (Serpukhov, IHEP) ; Dzhordzhadze, V. (SUBATECH, Nantes) ; Efremenko, Y.V. (Oak Ridge) ; Egdemir, J. (SUNY, Stony Brook) ; Ellinghaus, F. (Colorado U.) ; Emam, W.S. (UC, Riverside) ; Enokizono, A. (LLNL, Livermore) ; Enyo, H. (RIKEN BNL) ; Espagnon, B. (Orsay, IPN) ; Esumi, S. (Tsukuba U.) ; Eyser, K.O. (UC, Riverside) ; Fields, D.E. (RIKEN BNL) ; Finger, M. (Dubna, JINR) ; Finger, M., Jr. (Dubna, JINR) ; Fleuret, F. (Ecole Polytechnique) ; Fokin, S.L. (Kurchatov Inst., Moscow) ; Forestier, B. (Clermont-Ferrand U.) ; Fraenkel, Z. (Weizmann Inst.) ; Frantz, J.E. (SUNY, Stony Brook) ; Franz, A. (Brookhaven) ; Frawley, A.D. (Florida State U.) ; Fujiwara, K. (Wako, RIKEN) ; Fukao, Y. (Wako, RIKEN) ; Fung, S.-Y. (UC, Riverside) ; Fusayasu, T. (Nagasaki Inst. Appl. Sci.) ; Gadrat, S. (Clermont-Ferrand U.) ; Garishvili, I. (SUBATECH, Nantes) ; Gastineau, F. (SUBATECH, Nantes) ; Germain, M. (SUBATECH, Nantes) ; Glenn, A. (Tennessee U.) ; Gong, H. (SUNY, Stony Brook) ; Gonin, M. (Ecole Polytechnique) ; Gosset, J. (DAPNIA, Saclay) ; Goto, Y. (RIKEN BNL) ; Granier de Cassagnac, R. (Ecole Polytechnique) ; Grau, N. (Iowa State U.) ; Greene, S.V. (Vanderbilt U.) ; Grosse Perdekamp, M. (RIKEN BNL) ; Gunji, T. (Tokyo U., CNS) ; Gustafsson, H.-A. (Lund U.) ; Hachiya, T. (Wako, RIKEN) ; Hadj Henni, A. (SUBATECH, Nantes) ; Haegemann, C. (New Mexico U.) ; Haggerty, J.S. (Brookhaven) ; Hagiwara, M.N. (Abilene Christian U.) ; Hamagaki, H. (Tokyo U., CNS) ; Han, R. (Peking U.) ; Harada, H. (Hiroshima U.) ; Hartouni, Edward P. (LLNL, Livermore) ; Haruna, K. (Hiroshima U.) ; Harvey, M. (Brookhaven) ; Haslum, E. (Lund U.) ; Hasuko, K. (Wako, RIKEN) ; Hayano, R. (Tokyo U., CNS) ; Heffner, M. (LLNL, Livermore) ; Hemmick, T.K. (SUNY, Stony Brook) ; Hester, T. (UC, Riverside) ; Heuser, J.M. (Wako, RIKEN) ; He, X. (Georgia State U.) ; Hiejima, H. (Illinois U., Urbana) ; Hill, J.C. (Iowa State U.) ; Hobbs, R. (New Mexico U.) ; Hohlmann, M. (Florida Inst. Tech.) ; Holmes, M. (Vanderbilt U.) ; Holzmann, W. (SUNY, Stony Brook, Chem. Dept.) ; Homma, K. (Hiroshima U.) ; Hong, B. (Korea U.) ; Horaguchi, T. (Tokyo Inst. Tech.) ; Hornback, D. (SUBATECH, Nantes) ; Hur, M.G. (KAERI, Taejon) ; Ichihara, T. (RIKEN BNL) ; Imai, K. (Wako, RIKEN) ; Inaba, M. (Tsukuba U.) ; Inoue, Y. (Wako, RIKEN) ; Isenhower, D. (Abilene Christian U.) ; Isenhower, L. (Abilene Christian U.) ; Ishihara, M. (Wako, RIKEN) ; Isobe, T. (Tokyo U., CNS) ; Issah, M. (SUNY, Stony Brook, Chem. Dept.) ; Isupov, A. (Dubna, JINR) ; Jacak, B.V. (SUNY, Stony Brook) ; Jia, J. (Nevis Labs, Columbia U.) ; Jin, J. (Nevis Labs, Columbia U.) ; Jinnouchi, O. (RIKEN BNL) ; Johnson, B.M. (Brookhaven) ; Joo, K.S. (Myong Ji U.) ; Jouan, D. (Orsay, IPN) ; Kajihara, F. (Wako, RIKEN) ; Kametani, S. (Waseda U., RISE) ; Kamihara, N. (Tokyo Inst. Tech.) ; Kamin, J. (SUNY, Stony Brook) ; Kaneta, M. (RIKEN BNL) ; Kang, J.H. (IPAP, Seoul) ; Kanou, H. (Tokyo Inst. Tech.) ; Kawagishi, T. (Tsukuba U.) ; Kawall, D. (RIKEN BNL) ; Kazantsev, A.V. (Kurchatov Inst., Moscow) ; Kelly, S. (Colorado U.) ; Khanzadeev, A. (St. Petersburg, INP) ; Kikuchi, J. (Waseda U., RISE) ; Kim, D.H. (Myong Ji U.) ; Kim, D.J. (IPAP, Seoul) ; Kim, E. (Seoul Natl. U.) ; Kim, Y.-S. (KAERI, Taejon) ; Kinney, E. (Colorado U.) ; Kiss, A. (Eotvos U.) ; Kistenev, E. (Brookhaven) ; Kiyomichi, A. (Wako, RIKEN) ; Klay, J. (LLNL, Livermore) ; Klein-Boesing, Christian (Munster U.) ; Kochenda, L. (St. Petersburg, INP) ; Kochetkov, V. (Serpukhov, IHEP) ; Komkov, B. (St. Petersburg, INP) ; Konno, M. (Tsukuba U.) ; Kotchetkov, D. (UC, Riverside) ; Kozlov, A. (Weizmann Inst.) ; Kral, A. (Prague, Tech. U.) ; Kravitz, A. (Nevis Labs, Columbia U.) ; Kroon, P.J. (Brookhaven) ; Kubart, J. (Prague, Inst. Phys.) ; Kunde, G.J. (Los Alamos) ; Kurihara, N. (Tokyo U., CNS) ; Kurita, K. (Wako, RIKEN) ; Kweon, M.J. (Korea U.) ; Kwon, Y. (IPAP, Seoul) ; Kyle, G.S. (New Mexico State U.) ; Lacey, R. (SUNY, Stony Brook, Chem. Dept.) ; Lai, Y.-S. (Nevis Labs, Columbia U.) ; Lajoie, J.G. (Iowa State U.) ; Lebedev, A. (Iowa State U.) ; Le Bornec, Y. (Orsay, IPN) ; Leckey, S. (SUNY, Stony Brook) ; Lee, D.M. (Los Alamos) ; Lee, M.K. (IPAP, Seoul) ; Lee, T. (Seoul Natl. U.) ; Leitch, M.J. (Los Alamos) ; Leite, M.A.L. (Sao Paulo U.) ; Lenzi, B. (Sao Paulo U.) ; Lim, H. (Seoul Natl. U.) ; Liska, T. (Prague, Tech. U.) ; Litvinenko, A. (Dubna, JINR) ; Liu, M.X. (Los Alamos) ; Li, X. (Beijing, Inst. Atomic Energy) ; Li, X.H. (UC, Riverside) ; Love, B. (Vanderbilt U.) ; Lynch, D. (Brookhaven) ; Maguire, C.F. (Vanderbilt U.) ; Makdisi, Y.I. (Brookhaven) ; Malakhov, A. (Dubna, JINR) ; Malik, M.D. (New Mexico U.) ; Manko, V.I. (Kurchatov Inst., Moscow) ; Mao, Y. (Wako, RIKEN) ; Masek, L. (Prague, Inst. Phys.) ; Masui, H. (Tsukuba U.) ; Matathias, F. (SUNY, Stony Brook) ; McCain, M.C. (Illinois U., Urbana) ; McCumber, M. (SUNY, Stony Brook) ; McGaughey, P.L. (Los Alamos) ; Miake, Y. (Tsukuba U.) ; Mikes, P. (Prague, Inst. Phys.) ; Miki, K. (Tsukuba U.) ; Miller, T.E. (Vanderbilt U.) ; Milov, A. (SUNY, Stony Brook) ; Mioduszewski, S. (Brookhaven) ; Mishra, G.C. (Georgia State U.) ; Mishra, M. (Banaras Hindu U.) ; Mitchell, J.T. (Brookhaven) ; Mitrovski, M. (SUNY, Stony Brook, Chem. Dept.) ; Morreale, A. (UC, Riverside) ; Morrison, D.P. (Brookhaven) ; Moss, J.M. (Los Alamos) ; Moukhanova, T.V. (Kurchatov Inst., Moscow) ; Mukhopadhyay, D. (Vanderbilt U.) ; Murata, J. (Wako, RIKEN) ; Nagamiya, S. (KEK, Tsukuba) ; Nagata, Y. (Tsukuba U.) ; Nagle, J.L. (Colorado U.) ; Naglis, M. (Weizmann Inst.) ; Nakagawa, I. (RIKEN BNL) ; Nakamiya, Y. (Hiroshima U.) ; Nakamura, T. (Hiroshima U.) ; Nakano, K. (Tokyo Inst. Tech.) ; Newby, J. (LLNL, Livermore) ; Nguyen, M. (SUNY, Stony Brook) ; Norman, B.E. (Los Alamos) ; Nyanin, A.S. (Kurchatov Inst., Moscow) ; Nystrand, J. (Lund U.) ; O'Brien, E. (Brookhaven) ; Oda, S.X. (Tokyo U., CNS) ; Ogilvie, C.A. (Iowa State U.) ; Ohnishi, H. (Wako, RIKEN) ; Ojha, I.D. (Vanderbilt U.) ; Okada, H. (Wako, RIKEN) ; Okada, K. (RIKEN BNL) ; Oka, M. (Tsukuba U.) ; Omiwade, O.O. (Abilene Christian U.) ; Oskarsson, A. (Lund U.) ; Otterlund, I. (Lund U.) ; Ouchida, M. (Hiroshima U.) ; Ozawa, K. (Tokyo U., CNS) ; Pak, R. (Brookhaven) ; Pal, D. (Vanderbilt U.) ; Palounek, A.P.T. (Los Alamos) ; Pantuev, V. (SUNY, Stony Brook) ; Papavassiliou, V. (New Mexico State U.) ; Park, J. (Seoul Natl. U.) ; Park, W.J. (Korea U.) ; Pate, S.F. (New Mexico State U.) ; Pei, H. (Iowa State U.) ; Peng, J.-C. (Illinois U., Urbana) ; Pereira, H. (DAPNIA, Saclay) ; Peresedov, V. (Dubna, JINR) ; Peressounko, D.Yu. (Kurchatov Inst., Moscow) ; Pinkenburg, C. (Brookhaven) ; Pisani, R.P. (Brookhaven) ; Purschke, M.L. (Brookhaven) ; Purwar, A.K. (SUNY, Stony Brook) ; Qu, H. (Georgia State U.) ; Rak, J. (New Mexico U.) ; Rakotozafindrabe, A. (Ecole Polytechnique) ; Ravinovich, I. (Weizmann Inst.) ; Read, K.F. (Tennessee U.) ; Rembeczki, S. (Florida Inst. Tech.) ; Reuter, M. (SUNY, Stony Brook) ; Reygers, K. (Munster U.) ; Riabov, V. (St. Petersburg, INP) ; Riabov, Y. (St. Petersburg, INP) ; Roche, G. (Clermont-Ferrand U.) ; Romana, A. (Ecole Polytechnique) ; Rosati, M. (Iowa State U.) ; Rosendahl, S.S.E. (Lund U.) ; Rosnet, P. (Clermont-Ferrand U.) ; Rukoyatkin, P. (Dubna, JINR) ; Rykov, V.L. (Wako, RIKEN) ; Ryu, S.S. (IPAP, Seoul) ; Sahlmueller, B. (Munster U.) ; Saito, N. (RIKEN BNL) ; Sakaguchi, T. (Waseda U., RISE) ; Sakai, S. (Tsukuba U.) ; Sakata, H. (Hiroshima U.) ; Samsonov, V. (St. Petersburg, INP) ; Sato, H.D. (Wako, RIKEN) ; Sato, S. (Tsukuba U.) ; Sawada, S. (KEK, Tsukuba) ; Seele, J. (Colorado U.) ; Seidl, R. (Illinois U., Urbana) ; Semenov, V. (Serpukhov, IHEP) ; Seto, R. (UC, Riverside) ; Sharma, D. (Weizmann Inst.) ; Shea, T.K. (Brookhaven) ; Shein, I. (Serpukhov, IHEP) ; Shevel, A. (SUNY, Stony Brook, Chem. Dept.) ; Shibata, T.-A. (Tokyo Inst. Tech.) ; Shigaki, K. (Hiroshima U.) ; Shimomura, M. (Tsukuba U.) ; Shohjoh, T. (Tsukuba U.) ; Shoji, K. (Wako, RIKEN) ; Sickles, A. (SUNY, Stony Brook) ; Silva, C.L. (Sao Paulo U.) ; Silvermyr, D. (Oak Ridge) ; Silvestre, C. (DAPNIA, Saclay) ; Sim, K.S. (Korea U.) ; Singh, C.P. (Banaras Hindu U.) ; Singh, V. (Banaras Hindu U.) ; Skutnik, S. (Iowa State U.) ; Slunecka, M. (Dubna, JINR) ; Smith, W.C. (Abilene Christian U.) ; Soldatov, A. (Serpukhov, IHEP) ; Soltz, R.A. (LLNL, Livermore) ; Sondheim, W.E. (Los Alamos) ; Sorensen, S.P. (Tennessee U.) ; Sourikova, I.V. (Brookhaven) ; Staley, F. (DAPNIA, Saclay) ; Stankus, P.W. (Oak Ridge) ; Stenlund, E. (Lund U.) ; Stepanov, M. (New Mexico State U.) ; Ster, Andras (Budapest, RMKI) ; Stoll, S.P. (Brookhaven) ; Sugitate, T. (Hiroshima U.) ; Suire, C. (Orsay, IPN) ; Sullivan, J.P. (Los Alamos) ; Sziklai, J. (Budapest, RMKI) ; Tabaru, T. (RIKEN BNL) ; Takagi, S. (Tsukuba U.) ; Takagui, E.M. (Sao Paulo U.) ; Taketani, A. (Wako, RIKEN) ; Tanaka, K.H. (KEK, Tsukuba) ; Tanaka, Y. (Nagasaki Inst. Appl. Sci.) ; Tanida, K. (Wako, RIKEN) ; Tannenbaum, M.J. (Brookhaven) ; Taranenko, A. (SUNY, Stony Brook, Chem. Dept.) ; Tarjan, P. (Kossuth Lajos U., Debrecen) ; Thomas, T.L. (New Mexico U.) ; Togawa, M. (Wako, RIKEN) ; Toia, A. (SUNY, Stony Brook) ; Tojo, J. (Wako, RIKEN) ; Tomasek, L. (Prague, Inst. Phys.) ; Torii, H. (Wako, RIKEN) ; Towell, R.S. (Abilene Christian U.) ; Tram, V-N. (Ecole Polytechnique) ; Tserruya, I. (Weizmann Inst.) ; Tsuchimoto, Y. (Wako, RIKEN) ; Tuli, S.K. (Banaras Hindu U.) ; Tydesjo, H. (Lund U.) ; Tyurin, N. (Serpukhov, IHEP) ; Vale, C. (Iowa State U.) ; Valle, H. (Vanderbilt U.) ; van Hecke, H.W. (Los Alamos) ; Velkovska, J. (Vanderbilt U.) ; Vertesi, R. (Kossuth Lajos U., Debrecen) ; Vinogradov, A.A. (Kurchatov Inst., Moscow) ; Virius, M. (Prague, Tech. U.) ; Vrba, V. (Prague, Inst. Phys.) ; Vznuzdaev, E. (St. Petersburg, INP) ; Wagner, M. (Wako, RIKEN) ; Walker, D. (SUNY, Stony Brook) ; Wang, X.R. (New Mexico State U.) ; Watanabe, Y. (RIKEN BNL) ; Wessels, J. (Munster U.) ; White, S.N. (Brookhaven) ; Willis, N. (Orsay, IPN) ; Winter, D. (Nevis Labs, Columbia U.) ; Woody, C.L. (Brookhaven) ; Wysocki, M. (Colorado U.) ; Xie, W. (RIKEN BNL) ; Yamaguchi, Y.L. (Waseda U., RISE) ; Yanovich, A. (Serpukhov, IHEP) ; Yasin, Z. (UC, Riverside) ; Ying, J. (Georgia State U.) ; Yokkaichi, S. (RIKEN BNL) ; Young, G.R. (Oak Ridge) ; Younus, I. (New Mexico U.) ; Yushmanov, I.E. (Kurchatov Inst., Moscow) ; Zajc, W.A. (Nevis Labs, Columbia U.) ; Zaudtke, O. (Munster U.) ; Zhang, C. (Oak Ridge) ; Zhou, S. (Beijing, Inst. Atomic Energy) ; Zimanyi, J. (Budapest, RMKI) ; Zolin, L. (Dubna, JINR)

Published in: Phys.Rev.Lett.
Year: 2010
Vol.: 104
Page No: 132301
Pages: 6

Abstract: The production of low mass e+e- pairs for m_{e+e-} < 300 MeV/c^2 and 1 < p_T <5 GeV/c is measured in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. Enhanced yield above hadronic sources is observed. Treating the excess as internal conversions, the invariant yield of direct photons is deduced. In central Au+Au collisions, the excess of direct photon yield over p+p is exponential in transverse momentum, with inverse slope T = 221 +/- 19 (stat) +/- 19 (syst) MeV. Hydrodynamical models with initial temperatures ranging from 300--600 MeV at times of ~ 0.6 - 0.15 fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at ~ 170 MeV.

Web-Page: http://inspirebeta.net/record/784417/files/Fig1.png; http://inspirebeta.net/record/784417/files/Fig2.png; http://inspirebeta.net/record/784417/files/Fig3.png; http://inspirebeta.net/record/784417/files/Fig4b.png

Total numbers of views: 1403
Numbers of unique views: 636
e-proceeding
 Record created 2010-10-29, last modified 2014-01-30


External links:
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)