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Azimuthal Anisotropy of pi(0) Production in Au plus Au Collisions at root s(NN)=200 GeV: Path-Length Dependence of Jet Quenching and the Role of Initial Geometry

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Adare, A. [1] ; Afanasiev, S. [2] ; Aidala, C. [3] ; Ajitanand, N. N. [4] ; Akiba, Y. [5, 6] ; Al-Bataineh, H. [7] ; Alexander, J. [4] ; Aoki, K. [8, 6] ; Aramaki, Y. [9] ; Atomssa, E. T. [10] ; Averbeck, R. [11] ; Awes, T. C. [12] ; Azmoun, B. [13] ; Babintsev, V. [14] ; Bai, M. [15] ; Baksay, G. [16] ; Baksay, L. [16] ; Barish, K. N. [17] ; Bassalleck, B. [18] ; Basye, A. T. [19] ; Bathe, S. [17] ; Baublis, V. [20] ; Baumann, C. [21] ; Bazilevsky, A. [13] ; Belikov, S. [13] ; Belmont, R. [22] ; Bennett, R. [11] ; Berdnikov, A. [23] ; Berdnikov, Y. [23] ; Bickley, A. A. [1] ; Bok, J. S. [24] ; Boyle, K. [11] ; Brooks, M. L. [25] ; Buesching, H. [13] ; Bumazhnov, V. [14] ; Bunce, G. [5] ; Butsyk, S. [25] ; Camacho, C. M. [25] ; Campbell, S. [11] ; Chen, C. -H. [11] ; Chi, C. Y. [26, 27] ; Chiu, M. [13] ; Choi, I. J. [24] ; Choudhury, R. K. [28] ; Christiansen, P. [29] ; Chujo, T. [30] ; Chung, P. [4] ; Chvala, O. [17] ; Cianciolo, V. [12] ; Citron, Z. [11] ; Cole, B. A. [26, 27] ; Connors, M. [11] ; Constantin, P. [25] ; Csanad, M. [31] ; Csoergo, T. [32] ; Dahms, T. [11] ; Dairaku, S. [8, 6] ; Danchev, I. [22] ; Das, K. [33] ; Datta, A. [3] ; David, G. [13] ; Denisov, A. [14] ; Deshpande, A. [11, 5] ; Desmond, E. J. [13] ; Dietzsch, O. [34] ; Dion, A. [11] ; Donadelli, M. [34] ; Drapier, O. [10] ; Drees, A. [11] ; Drees, K. A. [15] ; Durham, J. M. [11] ; Durum, A. [14] ; Dutta, D. [28] ; Edwards, S. [33] ; Efremenko, Y. V. [12] ; Ellinghaus, F. [1] ; Engelmore, T. [26, 27] ; Enokizono, A. [35] ; En'yo, H. [5, 6] ; Esumi, S. [30] ; Fadem, B. [36] ; Fields, D. E. [18] ; Finger, Jr., M. [37] ; Finger, M. [37] ; Fleuret, F. [10] ; Fokin, S. L. [38] ; Fraenkel, Z. [39] ; Frantz, J. E. [11] ; Franz, A. ; Frawley, A. D. [33] ; Fujiwara, K. [6] ; Fukao, Y. [6] ; Fusayasu, T. [40] ; Garishvili, I. [41] ; Glenn, A. [1] ; Gong, H. [11] ; Gonin, M. [10] ; Goto, Y. [5, 6] ; de Cassagnac, R. Granier [10] ; Grau, N. [26, 27] ; Greene, S. V. [22] ; Perdekamp, M. 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[6, 51] ; Kazantsev, A. V. [38] ; Kempel, T. [46] ; Khanzadeev, A. [20] ; Kijima, K. M. [47] ; Kim, B. I. [48] ; Kim, D. H. [49] ; Kim, D. J. [52, 53] ; Kim, E. J. [54] ; Kim, E. [55] ; Kim, S. H. [24] ; Kim, Y. J. [42] ; Kinney, E. [1] ; Kiriluk, K. [1] ; Kiss, A. [31] ; Kistenev, E. [13] ; Kochenda, L. [20] ; Komkov, B. [20] ; Konno, M. [30] ; Koster, J. [42] ; Kotchetkov, D. [18] ; Kozlov, A. [39] ; Kral, A. [56] ; Kravitz, A. [26, 27] ; Kunde, G. J. [25] ; Kurita, K. [6, 51] ; Kurosawa, M. [6] ; Kwon, Y. [24] ; Kyle, G. S. [7] ; Lacey, R. [4] ; Lai, Y. S. [26, 27] ; Lajoie, J. G. [46] ; Lebedev, A. [46] ; Lee, D. M. [25] ; Lee, J. [43] ; Lee, K. B. [48] ; Lee, K. [55] ; Lee, K. S. [48] ; Leitch, M. J. [25] ; Leite, M. A. L. [34] ; Leitner, E. [22] ; Lenzi, B. [34] ; Liebing, P. [5] ; Levy, L. A. Linden [1] ; Liska, T. [56] ; Litvinenko, A. [2] ; Liu, H. [25, 7] ; Liu, M. X. [25] ; Li, X. [57] ; Love, B. [22] ; Luechtenborg, R. [21] ; Lynch, D. [13] ; Maguire, C. F. [22] ; Makdisi, Y. I. [15] ; Malakhov, A. [2] ; Malik, M. D. [18] ; Manko, V. I. [38] ; Mannel, E. [26, 27] ; Mao, Y. [6, 44] ; Masui, H. [30] ; Matathias, F. [26, 27] ; McCumber, M. [11] ; McGaughey, P. L. [25] ; Means, N. [11] ; Meredith, B. [42] ; Miake, Y. [30] ; Mignerey, A. C. [58] ; Mikes, P. [37, 59] ; Miki, K. [30] ; Milov, A. [13] ; Mishra, M. [60] ; Mitchell, J. T. [13] ; Mohanty, A. K. [28] ; Morino, Y. [9] ; Morreale, A. [17] ; Morrison, D. P. [13] ; Moukhanova, T. V. [38] ; Murata, J. [6, 51] ; Nagamiya, S. [61] ; Nagle, J. L. [1] ; Naglis, M. [39] ; Nagy, M. I. [31] ; Nakagawa, I. [5, 6] ; Nakamiya, Y. [47] ; Nakamura, T. [61, 47] ; Nakano, K. [62, 6] ; Newby, J. [35] ; Nguyen, M. [11] ; Nouicer, R. [13] ; Nyanin, A. S. [38] ; O'Brien, E. [13] ; Oda, S. X. [9] ; Ogilvie, C. A. [46] ; Okada, K. [5] ; Oka, M. [30] ; Onuki, Y. [6] ; Oskarsson, A. [29] ; Ouchida, M. [47] ; Ozawa, K. [9] ; Pak, R. [13] ; Pantuev, V. [11] ; Papavassiliou, V. [7] ; Park, I. H. [43] ; Park, J. [55] ; Park, S. K. [48] ; Park, W. J. [48] ; Pate, S. F. [7] ; Pei, H. [46] ; Peng, J. -C. [42] ; Pereira, H. [63] ; Peresedov, V. [2] ; Peressounko, D. Yu. [38] ; Pinkenburg, C. [13] ; Pisani, R. P. [13] ; Proissl, M. [11] ; Purschke, M. L. [13] ; Purwar, A. K. [25] ; Qu, H. [45] ; Rak, J. [52, 53] ; Rakotozafindrabe, A. [10] ; Ravinovich, I. [39] ; Read, K. F. [12, 41] ; Reygers, K. [21] ; Riabov, V. [20] ; Riabov, Y. [20] ; Richardson, E. [58] ; Roach, D. [22] ; Roche, G. [64] ; Rolnick, S. D. [17] ; Rosati, M. [46] ; Rosen, C. A. [1] ; Rosendahl, S. S. E. [29] ; Rosnet, P. [64] ; Rukoyatkin, P. [2] ; Ruzicka, P. [59] ; Sahlmueller, B. [21] ; Saito, N. [61] ; Sakaguchi, T. [13] ; Sakashita, K. [62, 6] ; Samsonov, V. [20] ; Sano, S. [9, 65] ; Sato, T. [30] ; Sawada, S. [61] ; Sedgwick, K. [17] ; Seele, J. [1] ; Seidl, R. [42] ; Semenov, A. Yu. [46] ; Seto, R. [17] ; Sharma, D. [39] ; Shein, I. [14] ; Shibata, T. -A. [62, 6] ; Shigaki, K. [47] ; Shimomura, M. [30] ; Shoji, K. [8, 6] ; Shukla, P. [28] ; Sickles, A. [13] ; Silva, C. L. [34] ; Silvermyr, D. [12] ; Silvestre, C. [63] ; Sim, K. S. [48] ; Singh, B. K. [60] ; Singh, C. P. [60] ; Singh, V. [60] ; Slunecka, M. [37] ; Soltz, R. A. [35] ; Sondheim, W. E. [25] ; Sorensen, S. P. [41] ; Sourikova, I. V. [13] ; Sparks, N. A. [19] ; Stankus, P. W. [12] ; Stenlund, E. [29] ; Stoll, S. P. [13] ; Sugitate, T. [47] ; Sukhanov, A. [13] ; Sziklai, J. [32] ; Takagui, E. M. [34] ; Taketani, A. [5, 6] ; Tanabe, R. [30] ; Tanaka, Y. [40] ; Tanida, K. [8, 5, 6, 55] ; Tannenbaum, M. J. [13] ; Tarafdar, S. [60] ; Taranenko, A. [4] ; Tarjan, P. [66] ; Themann, H. [11] ; Thomas, T. L. [18] ; Togawa, M. [8, 6] ; Toia, A. [11] ; Tomasek, L. [59] ; Torii, H. [47] ; Towell, R. S. [19] ; Tserruya, I. [39] ; Tsuchimoto, Y. [47] ; Vale, C. [46] ; Valle, H. [22] ; van Hecke, H. W. [25] ; Vazquez-Zambrano, E. [26, 27] ; Veicht, A. [42] ; Velkovska, J. [22] ; Vertesi, R. [32, 66] ; Vinogradov, A. A. [38] ; Virius, M. [56] ; Vrba, V. [59] ; Vznuzdaev, E. [20] ; Wang, X. R. [7] ; Watanabe, D. [47] ; Watanabe, K. [30] ; Watanabe, Y. [5, 6] ; Wei, F. [46] ; Wei, R. [4] ; Wessels, J. [21] ; White, S. N. [13] ; Winter, D. [26, 27] ; Wood, J. P. [19] ; Woody, C. L. [13] ; Wright, R. M. [19] ; Wysocki, M. [1] ; Xie, W. [5] ; Yamaguchi, Y. L. [9] ; Yamaura, K. [47] ; Yang, R. [42] ; Yanovich, A. [14] ; Ying, J. [45] ; Yokkaichi, S. [5, 6] ; Young, G. R. [12] ; Younus, I. [18] ; You, Z. [44] ; Yushmanov, I. E. [38] ; Zajc, W. A. [26, 27] ; Zhang, C. [12] ; Zhou, S. [57] ; Zolin, L. [2] ; Collaboration, PHENIX
Total Authors: 386
Affiliation:
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[1] Univ Colorado, Boulder, CO 80309 - USA
[2] Joint Inst Nucl Res, Dubna 141980 - Russia
[3] Univ Massachusetts, Dept Phys, Amherst, MA 01003 - USA
[4] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 - USA
[5] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 - USA
[6] RIKEN Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198 - Japan
[7] New Mexico State Univ, Las Cruces, NM 88003 - USA
[8] Kyoto Univ, Kyoto 6068502 - Japan
[9] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Tokyo 1130033 - Japan
[10] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau - France
[11] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 - USA
[12] Oak Ridge Natl Lab, Oak Ridge, TN 37831 - USA
[13] Dept Phys, Brookhaven Natl Lab, Upton, NY 11973 - USA
[14] Inst High Energy Phys, IHEP Protvino, State Res Ctr Russian Federat, Protvino 142281 - Russia
[15] Collider Accelerator Dept, Brookhaven Natl Lab, Upton, NY 11973 - USA
[16] Florida Inst Technol, Melbourne, FL 32901 - USA
[17] Univ Calif Riverside, Riverside, CA 92521 - USA
[18] Univ New Mexico, Albuquerque, NM 87131 - USA
[19] Abilene Christian Univ, Abilene, TX 79699 - USA
[20] Petersburg Nucl Phys Inst, Gatchina 188300, Leningrad Regio - Russia
[21] Univ Munster, Inst Kernphys, D-48149 Munster - Germany
[22] Vanderbilt Univ, Nashville, TN 37235 - USA
[23] St Petersburg State Univ, St Petersburg - Russia
[24] Yonsei Univ, IPAP, Seoul 120749 - South Korea
[25] Los Alamos Natl Lab, Los Alamos, NM 87545 - USA
[26] Columbia Univ, New York, NY 10027 - USA
[27] Nevis Labs, Irvington, NY 10533 - USA
[28] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra - India
[29] Lund Univ, Dept Phys, SE-22100 Lund - Sweden
[30] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305 - Japan
[31] Eotvos Lorand Univ, ELTE, H-1117 Budapest - Hungary
[32] Hungarian Acad Sci MTA KFKI RMKI, KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest - Hungary
[33] Florida State Univ, Tallahassee, FL 32306 - USA
[34] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
[35] Lawrence Livermore Natl Lab, Livermore, CA 94550 - USA
[36] Muhlenberg Coll, Allentown, PA 18104 - USA
[37] Charles Univ Prague, Prague 11636 - Czech Republic
[38] Kurchatov Inst, Russian Res Ctr, Moscow - Russia
[39] Weizmann Inst Sci, IL-76100 Rehovot - Israel
[40] Nagasaki Inst Appl Sci, Nagasaki 8510193 - Japan
[41] Univ Tennessee, Knoxville, TN 37996 - USA
[42] Univ Illinois, Urbana, IL 61801 - USA
[43] Ewha Womans Univ, Seoul 120750 - South Korea
[44] Peking Univ, Beijing - Peoples R China
[45] Georgia State Univ, Atlanta, GA 30303 - USA
[46] Iowa State Univ, Ames, IA 50011 - USA
[47] Hiroshima Univ, Hiroshima 7398526 - Japan
[48] Korea Univ, Seoul 136701 - South Korea
[49] Myongji Univ, Kyonggi Do 449728 - South Korea
[50] Univ Paris 11, CNRS, IN2P3, IPN Orsay, F-91406 Orsay - France
[51] Rikkyo Univ, Dept Phys, Tokyo 1718501 - Japan
[52] Helsinki Inst Phys, FI-40014 Jyvaskyla - Finland
[53] Univ Jyvaskyla, FI-40014 Jyvaskyla - Finland
[54] Chonnam Natl Univ, Jeonju 561756 - South Korea
[55] Seoul Natl Univ, Seoul 151742 - South Korea
[56] Czech Tech Univ, Prague 16636 - Czech Republic
[57] China Inst Atom Energy CIAE, Beijing - Peoples R China
[58] Univ Maryland, College Pk, MD 20742 - USA
[59] Acad Sci Czech Republic, Inst Phys, Prague 18221 - Czech Republic
[60] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh - India
[61] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801 - Japan
[62] Tokyo Inst Technol, Dept Phys, Tokyo 1528551 - Japan
[63] CEA Saclay, F-91191 Gif Sur Yvette - France
[64] Univ Clermont Ferrand, CNRS, IN2P3, LPC, F-63177 Clermont Ferrand - France
[65] Waseda Univ, Adv Res Inst Sci & Engn, Shibuya Ku, Tokyo 1620044 - Japan
[66] Debrecen Univ, H-1117 Debrecen - Hungary
Total Affiliations: 66
Document type: Journal article
Source: Physical Review Letters; v. 105, n. 14 SEP 27 2010.
Web of Science Citations: 86
Abstract

We have measured the azimuthal anisotropy of pi(0) production for 1 < p(T) < 18 GeV/c for Au + Au collisions at root s(NN) = 200 GeV. The observed anisotropy shows a gradual decrease for 3 less than or similar to p(T) less than or similar to 7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least similar to 10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and fluctuations is insufficient to account for this discrepancy. Calculations that implement a path-length dependence steeper than what is implied by current PQCD energy-loss models show reasonable agreement with the data. (AU)