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Photon-Hadron Jet Correlations in p+p and Au+Au Collisions at sqrt(s_NN) = 200 GeV
Authors :
Adare, A. Afanasiev, S. Aidala, C. Ajitanand, N.N. Akiba, Y. Al-Bataineh, H. Alexander, J. Al-Jamel, A. Aoki, K. Aphecetche, Laurent Armendariz, R. Aronson, S.H. Asai, J. Atomssa, E. T. Averbeck, R. Awes, T.C. Azmoun, B. Babintsev, V. Bai, M. Baksay, G. Baksay, L. Baldisseri, A. Barish, K.N. Barnes, P.D. Bassalleck, B. Basye, A.T. Bathe, S. Batsouli, S. Baublis, V. Bauer, F. Baumann, Cédric Bazilevsky, A. Belikov, S. Bennett, R. Berdnikov, A. Berdnikov, Y. Bickley, A.A. 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. Muñoz Camacho, C. Campbell, S. Chai, J.-S. Chang, B.S. Chang, W.C. Charvet, J.-L. Chernichenko, S. Chiba, J. Chi, C.Y. Chiu, M. Choi, I.J. Choudhury, R.K. Chujo, T. Chung, P. Churyn, A. Cianciolo, V. Citron, Z. Cleven, C.R. Cobigo, Y. Cole, B.A. Comets, M.P. Constantin, P. Csan'Ad, M. Cs¨org˝o, T. Dahms, T. Dairaku, S. Das, K. David, G. Deaton, M.B. Dehmelt, K. Delagrange, H. Denisov, A. D'Enterria, D. Deshpande, A. Desmond, E.J. Dietzsch, O. Dion, A. Donadelli, M. Drachenberg, J.L. Drapier, O. Drees, A. Drees, K.A. Dubey, A.K. Durum, A. Dutta, D. Dzhordzhadze, V. Efremenko, Y.V. Egdemir, J. Ellinghaus, F. Emam, W.S. Engelmore, T. Enokizono, A. En'Yo, H. Espagnon, B. Esumi, S. Eyser, K.O. Fadem, B. Fields, D.E. Finger, M. Fleuret, F. Fokin, S.L. Forestier, B. Fraenkel, Z. Frantz, J.E. Franz, A. Frawley, A.D. Fujiwara, K. Fukao, Y. Fung, S.-Y. Fusayasu, T. Gadrat, S. Garishvili, I. Gastineau, F. Germain, Marie Glenn, A. Gong, H. 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. Haegemann, C. Haggerty, J.S. Hagiwara, M.N. Hamagaki, H. Han, R. Harada, H. Hartouni, E.P. Haruna, K. Harvey, M. Haslum, E. Hasuko, K. Hayano, R. Heffner, M. Hemmick, T.K. Hester, T. Heuser, J.M. He, X. Hiejima, H. Hill, J.C. Hobbs, R. Hohlmann, M. Holmes, M. Holzmann, W. Homma, K. Hong, B. Horaguchi, T. Hornback, D. Huang, S. Hur, M.G. Ichihara, T. Ichimiya, R. Ikeda, Y. Imai, K. Imrek, J. Inaba, M. Inoue, Y. Isenhower, D. Isenhower, L. Ishihara, M. Isobe, T. Issah, M. Isupov, A. Ivanischev, D. Jacak, B.V. Jia, J. Jin, J. Jinnouchi, O. Johnson, B.M. Joo, K.S. Jouan, D. Kajihara, F. Kametani, S. Kamihara, N. Kamin, J. Kaneta, M. Kang, J.H. Kanou, H. Kapustinsky, J. Kawagishi, T. Kawall, D. Kazantsev, A.V. Kelly, Steven Kempel, T. Khanzadeev, A. Kijima, K.M. Kikuchi, J. Kim, B.I. Kim, D.H. Kim, D.J. Kim, E. Kim, S.H. Kim, Y.-S. Kinney, E. Kiriluk, K. Kiss, A. Kistenev, E. Kiyomichi, A. Klay, J. Klein-Boesing, C. Kochenda, L. Kochetkov, V. Komkov, B. Konno, M. Koster, J. Kotchetkov, D. Kozlov, A. Kr'Al, A. Kravitz, A. Kroon, P.J. Kubart, J. Kunde, G.J. Kurihara, N. Kurita, K. Kurosawa, M. Kweon, M.J. Kwon, Y. Kyle, G.S. Lacey, R. Lai, Y.-S. Lai, Y.S. Lajoie, J.G. Layton, D. Lebedev, A. Le Bornec, Y. Leckey, S. Lee, D.M. Lee, K.B. Lee, M.K. Lee, T. Leitch, M.J. Leite, M.A.L. Lenzi, B. Liebing, P. Lim, H. Liˇska, T. Litvinenko, A. Liu, Hong Liu, M.X. Li, Xiaojian Li, X.H. Love, B. Lynch, D. Maguire, C.F. Makdisi, Y.I. Malakhov, A. Malik, M.D. Manko, V.I. Mannel, E. Mao, Y. Maˇsek, L. Masui, H. Matathias, F. McCain, M.C. Mccumber, M. McGaughey, P.L. Means, N. Meredith, B. Miake, Y. Mikeˇs, P. Miki, K. Miller, T.E. Milov, A. Mioduszewski, S. Mishra, G.C. Mishra, M. Mitchell, J.T. Mitrovski, M. Mohanty, A.K. Morino, Y. Morreale, A. Morrison, D.P. Moss, J.M. Moukhanova, T.V. Mukhopadhyay, D. Murata, J. Nagamiya, S. Nagata, Y. Nagle, J.L. Naglis, M. Nagy, M.I. Nakagawa, I. Nakamiya, Y. Nakamura, T. Nakano, K. Newby, J. Nguyen, M. Niita, T. Norman, B.E. Nouicer, R. Nyanin, A.S. Nystrand, J. O'Brien, E. Oda, S.X. Ogilvie, C.A. Ohnishi, H. Ojha, I.D. Okada, H. Okada, K. Oka, M. Omiwade, O.O. Onuki, Y. Oskarsson, A. Otterlund, I. Ouchida, M. Ozawa, K. Pak, R. 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. Rakotozafindrabe, A. Ravinovich, I. Read, K.F. Rembeczki, S. Reuter, M. Reygers, K. Riabov, V. Riabov, Y. Roach, D. Roche, G. Rolnick, S.D. Romana, A. Rosati, M. Rosendahl, S.S.E. Rosnet, P. Rukoyatkin, P. Ruˇziˇcka, P. Rykov, V.L. Ryu, S.S. Sahlmueller, B. Saito, N. Sakaguchi, T. Sakai, S. Sakashita, K. Sakata, H. Samsonov, V. Sato, H.D. Sato, S. Sato, T. Sawada, S. Sedgwick, K. Seele, J. Seidl, R. Semenov, A.Yu. Semenov, V. Seto, R. Sharma, D. Shea, T.K. Shein, I. Shevel, A. Shibata, T.-A. Shigaki, K. Shimomura, M. Shohjoh, T. Shoji, K. Shukla, P. Sickles, A. Silva, C.L. Silvermyr, D. Silvestre, C. Sim, K.S. Singh, B.K. Singh, C.P. Singh, V. Skutnik, S. Sluneˇcka, M. 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. Sukhanov, A. Sullivan, J.P. Sziklai, J. Tabaru, T. Takagi, S. Takagui, E.M. Taketani, A. Tanabe, R. Tanaka, K.H. Tanaka, Y. Tanida, K. Tannenbaum, M.J. Taranenko, A. Tarj'An, P. Themann, H. Thomas, T.L. Togawa, M. Toia, A. Tojo, J. Tom'Aˇsek, L. Tomita, Y. Torii, H. Towell, R.S. Tram, V.-N. Tserruya, I. Tsuchimoto, Y. Tuli, S.K. Tydesj¨o, H. Tyurin, N. Vale, C. Valle, H. Van Hecke, H.W. Veicht, A. Velkovska, J. Vertesi, R. Vinogradov, A.A. Virius, M. Vrba, V. Vznuzdaev, E. Wagner, M. Walker, D. Wang, X.R. Watanabe, Y. Wei, F. Wessels, J. White, S.N. Willis, N. Winter, D. Woody, C.L. Wysocki, M. Xie, W. Yamaguchi, Y.L. Yamaura, K. Yang, R. Yanovich, A. Yasin, Z. Ying, J. Yokkaichi, S. Young, G.R. Younus, I. Yushmanov, I.E. Zajc, W.A. Zaudtke, O. Zhang, C. Zhou, S. Zim'Anyi, 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) 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) 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 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)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) 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)
Source :
Physical Review C, Physical Review C, 2009, 80, pp.024908. ⟨10.1103/PhysRevC.80.024908⟩, Physical Review C, American Physical Society, 2009, 80, pp.024908. ⟨10.1103/PhysRevC.80.024908⟩
Publication Year :
2009
Publisher :
HAL CCSD, 2009.
Abstract
We report the observation at the Relativistic Heavy Ion Collider (RHIC) of suppression of back-to-back correlations in the direct photon+jet channel in Au+Au relative to p+p collisions. Two-particle correlations of direct photon triggers with associated hadrons are obtained by statistical subtraction of the decay photon-hadron background. The initial momentum of the away-side parton is tightly constrained, because the parton-photon pair exactly balance in momentum at leading order in perturbative quantum chromodynamics (pQCD), making such correlations a powerful probe of the in-medium parton energy loss. The away-side nuclear suppression factor, I_AA, in central Au+Au collisions, is 0.32 +/- 0.12(stat) +/- 0.09(syst) for hadrons of 3 < p_T < 5 in coincidence with photons of 5 < p_T < 15 GeV/c. The suppression is comparable to that observed for high-p_T single hadrons and dihadrons. The direct photon associated yields in p+p collisions scale approximately with the momentum balance, z_T = p_T^hadron/p_T^photon, as expected for a measure of the away-side parton fragmentation function. We compare to Au+Au collisions for which the momentum balance dependence of the nuclear modification should be sensitive to the path-length dependence of parton energy loss.<br />478 authors from 63 institutions, 14 pages, 8 figures, and 4 tables. Submitted to Physical Review C
Details
Language :
English
ISSN :
24699985 and 24699993
Database :
OpenAIRE
Journal :
Physical Review C, Physical Review C, 2009, 80, pp.024908. ⟨10.1103/PhysRevC.80.024908⟩, Physical Review C, American Physical Society, 2009, 80, pp.024908. ⟨10.1103/PhysRevC.80.024908⟩
Accession number :
edsair.doi.dedup.....07d5244db9b7ac5b7c80b796c12cd331