/ Experiment-Nucl arXiv:0903.4886


High-pT pi0 Production with Respect to the Reaction Plane in Au + Au Collisions at s(NN)**(1/2) = 200-GeV


Afanasiev, S. (Dubna, JINR) ; Aidala, C. (Columbia U.) ; Ajitanand, N.N. (SUNY, Stony Brook, Chem. Dept.) ; Akiba, Y. (RIKEN BNL) ; Alexander, J. (SUNY, Stony Brook, Chem. Dept.) ; Al-Jamel, A. (New Mexico State U.) ; Aoki, K. (Nishina Ctr., RIKEN) ; Aphecetche, L. (SUBATECH, Nantes) ; Armendariz, R. (New Mexico State U.) ; Aronson, S.H. (Brookhaven) ; Averbeck, R. (SUNY, Stony Brook) ; Awes, T.C. (Oak Ridge) ; Azmoun, B. (Brookhaven) ; Babintsev, V. (Serpukhov, IHEP) ; 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. (Columbia U.) ; 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.) ; Bjorndal, M.T. (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) ; Chernichenko, S. (Serpukhov, IHEP) ; Chiba, J. (KEK, Tsukuba) ; Chi, C.Y. (Columbia U.) ; Chiu, M. (Columbia U.) ; Choi, I.J. (Yonsei U.) ; Chujo, T. (Vanderbilt U.) ; Cianciolo, V. (Oak Ridge) ; Cleven, C.R. (Georgia State U.) ; Cobigo, Y. (DAPNIA, Saclay) ; Cole, B.A. (Columbia U.) ; Comets, M.P. (Orsay, IPN) ; Constantin, P. (Iowa State U.) ; Csanad, M. (Eotvos U.) ; Csorgo, T. (Budapest, RMKI) ; Dahms, T. (SUNY, Stony Brook) ; Das, K. (Florida State U.) ; David, G. (Brookhaven) ; Delagrange, H. (SUBATECH, Nantes) ; Denisov, A. (Serpukhov, IHEP) ; d'Enterria, D. (Columbia U.) ; Deshpande, A. (SUNY, Stony Brook) ; Desmond, E.J. (Brookhaven) ; Dietzsch, O. (Sao Paulo U.) ; Dion, A. (SUNY, Stony Brook) ; 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. (Tennessee U.) ; Efremenko, Y.V. (Oak Ridge) ; Egdemir, J. (SUNY, Stony Brook) ; Enokizono, A. (Hiroshima U.) ; En'yo, H. (RIKEN BNL) ; Espagnon, B. (Orsay, IPN) ; Esumi, S. (Tsukuba U.) ; Fields, D.E. (RIKEN BNL) ; Fleuret, F. (Ecole Polytechnique) ; Fokin, S.L. (Kurchatov Inst., Moscow) ; Forestier, B. (Clermont-Ferrand U.) ; Fraenkel, Z. (Weizmann Inst.) ; Frantz, J.E. (Columbia U.) ; Franz, A. (Brookhaven) ; Frawley, A.D. (Florida State U.) ; Fukao, Y. (Nishina Ctr., RIKEN) ; Fung, S.-Y. (UC, Riverside) ; Gadrat, S. (Clermont-Ferrand U.) ; Gastineau, F. (SUBATECH, Nantes) ; Germain, M. (SUBATECH, Nantes) ; Glenn, A. (Tennessee U.) ; 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. (Nishina Ctr., RIKEN) ; Hadj Henni, A. (SUBATECH, Nantes) ; Haggerty, J.S. (Brookhaven) ; Hagiwara, M.N. (Abilene Christian U.) ; Hamagaki, H. (Tokyo U., CNS) ; Harada, H. (Hiroshima U.) ; Hartouni, Edward P. (LLNL, Livermore) ; Haruna, K. (Hiroshima U.) ; Harvey, M. (Brookhaven) ; Haslum, E. (Lund U.) ; Hasuko, K. (Nishina Ctr., RIKEN) ; Hayano, R. (Tokyo U., CNS) ; Heffner, M. (LLNL, Livermore) ; Hemmick, T.K. (SUNY, Stony Brook) ; Heuser, J.M. (Nishina Ctr., RIKEN) ; He, X. (Georgia State U.) ; Hiejima, H. (Illinois U., Urbana) ; Hill, J.C. (Iowa State U.) ; Hobbs, R. (New Mexico U.) ; Holmes, M. (Vanderbilt U.) ; Holzmann, W. (SUNY, Stony Brook, Chem. Dept.) ; Homma, K. (Hiroshima U.) ; Hong, B. (Korea U.) ; Horaguchi, T. (Tokyo Inst. Tech.) ; Hur, M.G. (KAERI, Taejon) ; Ichihara, T. (RIKEN BNL) ; Imai, K. (Nishina Ctr., RIKEN) ; Inaba, M. (Tsukuba U.) ; Isenhower, D. (Abilene Christian U.) ; Isenhower, L. (Abilene Christian U.) ; Ishihara, M. (Nishina Ctr., RIKEN) ; Isobe, T. (Tokyo U., CNS) ; Issah, M. (SUNY, Stony Brook) ; Isupov, A. (Dubna, JINR) ; Jacak, B.V. (SUNY, Stony Brook) ; Jia, J. (Columbia U.) ; Jin, J. (Columbia U.) ; Jinnouchi, O. (RIKEN BNL) ; Johnson, B.M. (Brookhaven) ; Joo, K.S. (Myong Ji U.) ; Jouan, D. (Orsay, IPN) ; Kajihara, F. (Nishina Ctr., RIKEN) ; Kametani, S. (Waseda U.) ; Kamihara, N. (Tokyo Inst. Tech.) ; Kaneta, M. (RIKEN BNL) ; Kang, J.H. (Yonsei U.) ; Kawagishi, T. (Tsukuba U.) ; Kazantsev, A.V. (Kurchatov Inst., Moscow) ; Kelly, S. (Colorado U.) ; Khanzadeev, A. (St. Petersburg, INP) ; Kim, D.J. (Yonsei U.) ; Kim, E. (Seoul Natl. U.) ; Kim, Y.-S. (KAERI, Taejon) ; Kinney, E. (Colorado U.) ; Kiss, A. (Eotvos U.) ; Kistenev, E. (Brookhaven) ; Kiyomichi, A. (Nishina Ctr., RIKEN) ; 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.) ; Kroon, P.J. (Brookhaven) ; Kunde, G.J. (Los Alamos) ; Kurihara, N. (Tokyo U., CNS) ; Kurita, K. (Nishina Ctr., RIKEN) ; Kweon, M.J. (Korea U.) ; Kwon, Y. (Yonsei U.) ; Kyle, G.S. (New Mexico State U.) ; Lacey, R. (SUNY, Stony Brook, Chem. Dept.) ; 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. (Yonsei U.) ; Leitch, M.J. (Los Alamos) ; Leite, M.A.L. (Sao Paulo U.) ; Lim, H. (Seoul Natl. U.) ; Litvinenko, A. (Dubna, JINR) ; Liu, M.X. (Los Alamos) ; Li, X.H. (UC, Riverside) ; 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) ; Masui, H. (Tsukuba U.) ; Matathias, F. (SUNY, Stony Brook) ; McCain, M.C. (Illinois U., Urbana) ; McGaughey, P.L. (Los Alamos) ; Miake, Y. (Tsukuba U.) ; Miller, T.E. (Vanderbilt U.) ; Milov, A. (SUNY, Stony Brook) ; Mioduszewski, S. (Brookhaven) ; Mishra, G.C. (Georgia State U.) ; Mitchell, J.T. (Brookhaven) ; Morrison, D.P. (Brookhaven) ; Moss, J.M. (Los Alamos) ; Moukhanova, T.V. (Kurchatov Inst., Moscow) ; Mukhopadhyay, D. (Vanderbilt U.) ; Murata, J. (Nishina Ctr., RIKEN) ; Nagamiya, S. (KEK, Tsukuba) ; Nagata, Y. (Tsukuba U.) ; Nagle, J.L. (Colorado U.) ; Naglis, M. (Weizmann Inst.) ; Nakamura, T. (Hiroshima U.) ; 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) ; Ogilvie, C.A. (Iowa State U.) ; Ohnishi, H. (Nishina Ctr., RIKEN) ; Ojha, I.D. (Vanderbilt U.) ; Okada, H. (Nishina Ctr., RIKEN) ; Okada, K. (RIKEN BNL) ; Omiwade, O.O. (Abilene Christian U.) ; Oskarsson, A. (Lund U.) ; Otterlund, I. (Lund U.) ; Ozawa, K. (Tokyo U., CNS) ; 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. (Iowa State U.) ; Ravinovich, I. (Weizmann Inst.) ; Read, K.F. (Tennessee U.) ; 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. (Nishina Ctr., RIKEN) ; Ryu, S.S. (Yonsei U.) ; Sahlmueller, B. (Munster U.) ; Saito, N. (RIKEN BNL) ; Sakaguchi, T. (Waseda U.) ; Sakai, S. (Tsukuba U.) ; Samsonov, V. (St. Petersburg, INP) ; Sato, H.D. (Nishina Ctr., RIKEN) ; Sato, S. (Tsukuba U.) ; Sawada, S. (KEK, Tsukuba) ; Semenov, V. (Serpukhov, IHEP) ; Seto, R. (UC, Riverside) ; Sharma, D. (Weizmann Inst.) ; Shea, T.K. (Brookhaven) ; Shein, I. (Serpukhov, IHEP) ; Shibata, T.-A. (Tokyo Inst. Tech.) ; Shigaki, K. (Hiroshima U.) ; Shimomura, M. (Tsukuba U.) ; Shohjoh, T. (Tsukuba U.) ; Shoji, K. (Nishina Ctr., RIKEN) ; Sickles, A. (SUNY, Stony Brook) ; Silva, C.L. (Sao Paulo U.) ; Silvermyr, D. (Oak Ridge) ; Sim, K.S. (Korea U.) ; Singh, C.P. (Banaras Hindu U.) ; Singh, V. (Banaras Hindu U.) ; Skutnik, S. (Iowa State U.) ; 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, A. (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. (RIKEN BNL) ; Tanaka, K.H. (KEK, Tsukuba) ; Tanaka, Y. (Nagasaki Inst. Appl. Sci.) ; Tanida, K. (RIKEN BNL) ; Tannenbaum, M.J. (Brookhaven) ; Taranenko, A. (SUNY, Stony Brook, Chem. Dept.) ; Tarjan, P. (Debrecen U.) ; Thomas, T.L. (New Mexico U.) ; Togawa, M. (Nishina Ctr., RIKEN) ; Tojo, J. (Nishina Ctr., RIKEN) ; Torii, H. (Nishina Ctr., RIKEN) ; Towell, R.S. (Abilene Christian U.) ; Tram, V-N. (Ecole Polytechnique) ; Tserruya, I. (Weizmann Inst.) ; Tsuchimoto, Y. (Nishina Ctr., 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. (Debrecen U.) ; Vinogradov, A.A. (Kurchatov Inst., Moscow) ; Vznuzdaev, E. (St. Petersburg, INP) ; Wagner, M. (Nishina Ctr., RIKEN) ; 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. (Columbia U.) ; Woody, C.L. (Brookhaven) ; Wysocki, M. (Colorado U.) ; Xie, W. (RIKEN BNL) ; Yanovich, A. (Serpukhov, IHEP) ; Yokkaichi, S. (RIKEN BNL) ; Young, G.R. (Oak Ridge) ; Younus, I. (New Mexico U.) ; Yushmanov, I.E. (Kurchatov Inst., Moscow) ; Zajc, W.A. (Columbia U.) ; Zaudtke, O. (Munster U.) ; Zhang, C. (Columbia U.) ; Zimanyi, J. (Budapest, RMKI) ; Zolin, L. (Dubna, JINR)

Published in: Phys.Rev.
Year: 2009
Vol.: C80
Page No: 054907
Pages: 35

Abstract: Measurements of the azimuthal anisotropy of high-\pT neutral pion neutral pion production in Au+Au collisions at sqrt(s_NN) = 200 GeV by the PHENIX experiment are presented. The data included in this paper were collected during the 2004 RHIC running period and represent approximately an order of magnitude increase in the number of analyzed events relative to previously published results. Azimuthal angle distributions of pi^0s detected in the PHENIX electromagnetic calorimeters are measured relative to the reaction plane determined event-by-event using the forward and backward beam-beam counters. Amplitudes of the second Fourier component (v_2) of the angular distributions are presented as a function of pi^0 transverse momentum p_T for different bins in collision centrality. Measured reaction plane dependent pi^0 yields are used to determine the azimuthal dependence of the pi^0 suppression as a function of p_T, R_AA (Delta phi,p_T). A jet-quenching motivated geometric analysis is presented that attempts to simultaneously describe the centrality dependence and reaction plane angle dependence of the pi^0 suppression in terms of the path lengths of hypothetical parent partons in the medium. This set of results allows for a detailed examination of the influence of geometry in the collision region, and of the interplay between collective flow and jet-quenching effects along the azimuthal axis.

Web-Page: http://inspirebeta.net/record/816486/files/fig_3040_raapt_peakshift.png; http://inspirebeta.net/record/816486/files/fig_RAADphi_Cent00_10.png; http://inspirebeta.net/record/816486/files/fig_RAADphi_Cent10_20.png; http://inspirebeta.net/record/816486/files/fig_RAADphi_Cent20_30.png; http://inspirebeta.net/record/816486/files/fig_RAADphi_Cent30_40.png; http://inspirebeta.net/record/816486/files/fig_RAADphi_Cent40_50.png; http://inspirebeta.net/record/816486/files/fig_RAADphi_Cent50_60.png; http://inspirebeta.net/record/816486/files/fig_RAANpartPt.png; http://inspirebeta.net/record/816486/files/fig_RAANpartPt_logy.png; http://inspirebeta.net/record/816486/files/fig_RAAptDphi_Log.png; http://inspirebeta.net/record/816486/files/fig_RAAptDphi_subset.png; http://inspirebeta.net/record/816486/files/fig_RAAv2.png; http://inspirebeta.net/record/816486/files/fig_dndphi_example.png; http://inspirebeta.net/record/816486/files/fig_mass_example.png; http://inspirebeta.net/record/816486/files/fig_pi0_RAA_vs_Leff.png; http://inspirebeta.net/record/816486/files/fig_pi0_RAA_vs_lepsi.png; http://inspirebeta.net/record/816486/files/fig_pi0_RAA_vs_lepsihard.png; http://inspirebeta.net/record/816486/files/fig_pi0_RAA_vs_rholxydiv.png; http://inspirebeta.net/record/816486/files/fig_pi0v2_fits.png; http://inspirebeta.net/record/816486/files/fig_pi0v2_nofits.png; http://inspirebeta.net/record/816486/files/fig_pi0v2comb_fits.png; http://inspirebeta.net/record/816486/files/fig_pi0v2comb_nofits.png; http://inspirebeta.net/record/816486/files/fig_v2_pol1_fits.png; http://inspirebeta.net/record/816486/files/resCorrV2Canvas.png

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