| Thème(s) : |
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Physique/Physique Nucléaire Expérimentale
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| Titre : |
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Energy dependence of $\pi^0$ production in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 22.4, 62.4, and 200 GeV |
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| Auteur : |
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A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, K. Aoki, L. Aphecetche1, R. Armendariz, S.H. Aronson, J. Asai, E.T. Atomssa2, R. Averbeck, T.C. Awes, B. Azmoun, V. Babintsev, M. Bai, G. Baksay, L. Baksay, A. Baldisseri3, K.N. Barish, P.D. Barnes, B. Bassalleck, A.T. Basye, S. Bathe, S. Batsouli, V. Baublis, C. Baumann, A. Bazilevsky, S. Belikov, R. Bennett, A. Berdnikov, Y. Berdnikov, A.A. Bickley, J.G. Boissevain, H. Borel3, K. Boyle, M.L. Brooks, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, C.M. Camacho, S. Campbell, B.S. Chang, W.C. Chang, J.-L. Charvet3, S. Chernichenko, J. Chiba, C.Y. Chi, M. Chiu, I.J. Choi, R.K. Choudhury, T. Chujo, P. Chung, A. Churyn, V. Cianciolo, Z. Citron, C.R. Cleven, B.A. Cole, M.P. Comets4, P. Constantin, M. Csanad, T. Csorgo, T. Dahms, S. Dairaku, K. Das, G. David, M.B. Deaton, K. Dehmelt, H. Delagrange1, A. Denisov, D. d'Enterria2, A. Deshpande, E.J. Desmond, O. Dietzsch, A. Dion, M. Donadelli, O. Drapier2, A. Drees, K.A. Drees, A.K. Dubey, A. Durum, D. Dutta, V. Dzhordzhadze, Y.V. Efremenko, J. Egdemir, F. Ellinghaus, W.S. Emam, T. Engelmore, A. Enokizono, H. En'yo, S. Esumi, K.O. Eyser, B. Fadem, D.E. Fields, M. Finger Jr., M. Finger, F. Fleuret2, S.L. Fokin, Z. Fraenkel, J.E. Frantz, A. Franz, A.D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, S. Gadrat5, I. Garishvili, A. Glenn, H. Gong, M. Gonin2, J. Gosset3, Y. Goto, R. Granier de Cassagnac2, N. Grau, S.V. Greene, M. Grosse Perdekamp, T. Gunji, H.-A. Gustafsson, T. Hachiya, A. Hadj Henni1, C. Haegemann, J.S. Haggerty, H. Hamagaki, R. Han, H. Harada, E.P. Hartouni, K. Haruna, E. Haslum, R. Hayano, M. Heffner, T.K. Hemmick, T. Hester, X. He, H. Hiejima, J.C. Hill, R. Hobbs, M. Hohlmann, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, Y. Ikeda, K. Imai, J. Imrek, M. Inaba, Y. Inoue, D. Isenhower, L. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, D. Ivanischev, B.V. Jacak, J. Jia, J. Jin, O. Jinnouchi, B.M. Johnson, K.S. Joo, D. Jouan4, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, M. Kaneta, J.H. Kang, H. Kanou, J. Kapustinsky, D. Kawall, A.V. Kazantsev, A. Khanzadeev, K.M. Kijima, J. Kikuchi, B.I. Kim, D.H. Kim, D.J. Kim, E. Kim, S.H. Kim, E. Kinney, K. Kiriluk, A. Kiss, E. Kistenev, A. Kiyomichi, J. Klay, C. Klein-Boesing, L. Kochenda, V. Kochetkov, B. Komkov, M. Konno, J. Koster, D. Kotchetkov, A. Kozlov, A. Kral, A. Kravitz, J. Kubart, G.J. Kunde, N. Kurihara, K. Kurita, M. Kurosawa, M.J. Kweon, Y. Kwon, G.S. Kyle, R. Lacey, Y.-S. Lai, Y.S. Lai, J.G. Lajoie, D. Layton, A. A. Lebedev, D.M. Lee, K.B. Lee, M.K. Lee, T. Lee, M.J. Leitch, M.A.L. Leite, B. Lenzi, P. Liebing, T. Liska, A. Litvinenko, H. Liu, M.X. Liu, X. Li, B. Love, D. Lynch, C.F. Maguire, Y.I. Makdisi, A. Malakhov, M.D. Malik, V.I. Manko, E. Mannel, Y. Mao, L. Masek, H. Masui, F. Matathias, M. Mccumber, P.L. McGaughey, N. Means, B. Meredith, Y. Miake, P. Mikes, K. Miki, T.E. Miller, A. Milov, S. Mioduszewski, M. Mishra, J.T. Mitchell, M. Mitrovski, A.K. Mohanty, Y. Morino, A. Morreale, D.P. Morrison, T.V. Moukhanova, D. Mukhopadhyay, J. Murata, S. Nagamiya, Y. Nagata, J.L. Nagle, M. Naglis, M.I. Nagy, I. Nakagawa, Y. Nakamiya, T. Nakamura, K. Nakano, J. Newby, M. Nguyen, T. Niita, B.E. Norman, R. Nouicer, A.S. Nyanin, E. O'Brien, S.X. Oda, C.A. Ogilvie, H. Ohnishi, H. Okada, K. Okada, M. Oka, O.O. Omiwade, Y. Onuki, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, D. Pal, A.P.T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, W.J. Park, S.F. Pate, H. Pei, J.-C. Peng, H. Pereira3, V. Peresedov, D.Yu. Peressounko, C. Pinkenburg, M.L. Purschke, A.K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe2, I. Ravinovich, K.F. Read, S. Rembeczki, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, D. Roach, G. Roche5, S.D. Rolnick, A. Romana2, M. Rosati, S.S.E. Rosendahl, P. Rosnet5, P. Rukoyatkin, P. Ruzicka, V.L. Rykov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, H. Sakata, V. Samsonov, S. Sato, T. Sato, S. Sawada, K. Sedgwick, J. Seele, R. Seidl, A.Yu. Semenov, V. Semenov, R. Seto, D. Sharma, I. Shein, A. Shevel, T.-A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C.L. Silva, D. Silvermyr, C. Silvestre3, K.S. Sim, B.K. Singh, C.P. Singh, V. Singh, S. Skutnik, M. Slunecka, A. Soldatov, R.A. Soltz, W.E. Sondheim, S.P. Sorensen, I.V. Sourikova, F. Staley3, P.W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S.P. Stoll, T. Sugitate, C. Suire4, A. Sukhanov, J. Sziklai, T. Tabaru, S. Takagi, E.M. Takagui, A. Taketani, R. Tanabe, Y. Tanaka, K. Tanida, M.J. Tannenbaum, A. Taranenko, P. Tarjan, H. Themann, T.L. Thomas, M. Togawa, A. Toia, J. Tojo, L. Tomasek, Y. Tomita, H. Torii, R.S. Towell, V.-N. Tram2, I. Tserruya, Y. Tsuchimoto, C. Vale, H. Valle, H.W. Vanhecke, A. Veicht, J. Velkovska, R. Vertesi, A.A. Vinogradov, M. Virius, V. Vrba, E. Vznuzdaev, M. Wagner, D. Walker, X.R. Wang, Y. Watanabe, F. Wei, J. Wessels, S.N. White, D. Winter, C.L. Woody, M. Wysocki, W. Xie, Y.L. Yamaguchi, K. Yamaura, R. Yang, A. Yanovich, Z. Yasin, J. Ying, S. Yokkaichi, G.R. Young, I. Younus, I.E. Yushmanov, W.A. Zajc, O. Zaudtke, C. Zhang, S. Zhou, J. Zimanyi, L. Zolin |
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| Laboratoire : |
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| Résumé : |
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Neutral pion transverse momentum (pT) spectra at mid-rapidity (|y| < 0.35) were measured in Cu+Cu collisions at \sqrt s_NN = 22.4, 62.4, and 200 GeV. Relative to pi -zero yields in p+p collisions scaled by the number of inelastic nucleon-nucleon collisions (Ncoll) at the respective energies, the pi-zero yields for pT \ge 2 GeV/c in central Cu+Cu collisions at 62.4 and 200 GeV are suppressed, whereas an enhancement is observed at 22.4 GeV. A comparison with a jet quenching model suggests that final state parton energy loss dominates in central Cu+Cu collisions at 62.4 GeV and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone. |
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| Collaboration/Projet : |
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PHENIX |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
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2008 |
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| Nom du périodique : |
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| Physical Review Letters (Phys. Rev. Lett.) |
| Publisher |
American Physical Society |
| ISSN |
0031-9007 (eISSN : 1079-7114) |
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| Volume : |
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101 |
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| Page/Article : |
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162301 |
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| Classification PACS : |
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25.75.Dw |
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| Commentaire : |
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431 authors from 63 institutions, 7 pages, 3 figures, 2 tables. 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 |
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