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Centrality dependence of low-momentum direct-photon production in Au plus Au collisions at root s(NN)=200 GeV

Title
Centrality dependence of low-momentum direct-photon production in Au plus Au collisions at root s(NN)=200 GeV
Authors
Adare, A.Afanasiev, S.Aidala, C.Ajitanand, N. N.Akiba, Y.Akimoto, R.Al-Bataineh, H.Al-Ta'ani, H.Alexander, J.Angerami, A.Aoki, K.Apadula, N.Aramaki, Y.Asano, H.Aschenauer, E. C.Atomssa, E. T.Averbeck, R.Awes, T. C.Azmoun, B.Babintsev, V.Bai, M.Baksay, G.Baksay, L.Bannier, B.Barish, K. N.Bassalleck, B.Basye, A. T.Bathe, S.Baublis, V.Baumann, C.Baumgart, S.Bazilevsky, A.Belikov, S.Belmont, R.Bennett, R.Berdnikov, A.Berdnikov, Y.Bickley, A. A.Bing, X.Blau, D. S.Bok, J. S.Boyle, K.Brooks, M. L.Buesching, H.Bumazhnov, V.Bunce, G.Butsyk, S.Camacho, C. M.Campbell, S.Castera, P.Chen, C. -H.Chi, C. Y.Chiu, M.Choi, I. J.Choi, J. B.Choi, S.Choudhury, R. K.Christiansen, P.Chujo, T.Chung, P.Chvala, O.Cianciolo, V.Citron, Z.Cole, B. A.Connors, M.Constantin, P.Csanad, M.Csoergo, T.Dahms, T.Dairaku, S.Danchev, I.Das, K.Datta, A.Daugherity, M. S.David, G.Denisov, A.Deshpande, A.Desmond, E. J.Dharmawardane, K. V.Dietzsch, O.Ding, L.Dion, A.Donadelli, M.Drapier, O.Drees, A.Drees, K. A.Durham, J. M.Durum, A.Dutta, D.D'Orazio, L.Edwards, S.Efremenko, Y. V.Ellinghaus, F.Engelmore, T.Enokizono, A.En'yo, H.Esumi, S.Eyser, K. O.Fadem, B.Fields, D. E.Finger, M.Finger, M., Jr.Fleuret, F.Fokin, S. L.Fraenkel, Z.Frantz, J. E.Franz, A.Frawley, A. D.Fujiwara, K.Fukao, Y.Fusayasu, T.Gainey, K.Gal, C.Garishvili, A.Garishvili, I.Glenn, A.Gong, H.Gong, X.Gonin, M.Goto, Y.de Cassagnac, R. GranierGrau, N.Greene, V.Perdekamp, M. GrosseGunji, T.Guo, L.Gustafsson, H. -A.Hachiya, T.Haggerty, J. S.Hahn, K. I.Hamagaki, H.Hamblen, J.Han, R.Hanks, J.Hartouni, E. P.Hashimoto, K.Haslum, E.Hayano, R.He, X.Heffner, M.Hemmick, T. K.Hester, T.Hill, J. C.Hohlmann, M.Hollis, R. S.Holzmann, W.Homma, K.Hong, B.Horaguchi, T.Hori, Y.Hornback, D.Huang, S.Ichihara, T.Ichimiya, R.Ide, J.Iinuma, H.Ikeda, Y.Imai, K.Imrek, J.Inaba, M.Iordanova, A.Isenhower, D.Ishihara, M.Isobe, T.Issah, M.Isupov, A.Ivanischev, D.Ivanishchev, D.Jacak, B. V.Javani, M.Jia, J.Jiang, X.Jin, J.Johnson, B. M.Joo, K. S.Jouan, D.Jumper, D. S.Kajihara, F.Kametani, S.Kamihara, N.Kamin, J.Kaneti, S.Kang, B. H.Kang, J. H.Kang, J. S.Kapustinsky, J.Karatsu, K.Kasai, M.Kawall, D.Kawashima, M.Kazantsev, A. V.Kempel, T.Khanzadeev, A.Kijima, K. M.Kim, B. I.Kim, C.Kim, D. H.Kim, D. J.Kim, E.Kim, E. -J.Kim, H. J.Kim, K. -B.Kim, S. H.Kim, Y. -J.Kim, Y. K.Kinney, E.Kiriluk, K.Kiss, A.Kistenev, E.Klatsky, J.Kleinjan, D.Kline, P.Kochenda, L.Komatsu, Y.Komkov, B.Konno, M.Koster, J.Kotchetkov, D.Kotov, D.Kozlov, A.Kral, A.Kravitz, A.Krizek, F.Kunde, G. J.Kurita, K.Kurosawa, M.Kwon, Y.Kyle, G. S.Lacey, R.Lai, Y. S.Lajoie, J. G.Lebedev, A.Lee, B.Lee, D. M.Lee, J.Lee, K.Lee, K. B.Lee, K. S.Lee, S. H.Lee, S. R.Leitch, M. J.Leite, M. A. L.Leitgab, M.Leitner, E.Lenzi, B.Lewis, B.Li, X.Liebing, P.Lim, S. H.Levy, L. A. LindenLiska, T.Litvinenko, A.Liu, H.Liu, M. X.Love, B.Luechtenborg, R.Lynch, D.Maguire, C. F.Makdisi, Y. I.Makek, M.Malakhov, A.Malik, M. D.Manion, A.Manko, V. I.Mannel, E.Mao, Y.Masui, H.Masumoto, S.Matathias, F.McCumber, M.McGaughey, P. L.McGlinchey, D.McKinney, C.Means, N.Mendoza, M.Meredith, B.Miake, Y.Mibe, T.Mignerey, A. C.Mikes, P.Miki, K.Milov, A.Mishra, D. K.Mishra, M.Mitchell, J. T.Miyachi, Y.Miyasaka, S.Mohanty, A. K.Moon, H. J.Morino, Y.Morreale, A.Morrison, D. P.Motschwiller, S.Moukhanova, T. V.Murakami, T.Murata, J.Nagae, T.Nagamiya, S.Nagle, J. L.Naglis, M.Nagy, M. I.Nakagawa, I.Nakamiya, Y.Nakamura, K. R.Nakamura, T.Nakano, K.Nattrass, C.Nederlof, A.Newby, J.Nguyen, M.Nihashi, M.Nouicer, R.Novitzky, N.Nyanin, A. S.O'Brien, E.Oda, S. X.Ogilvie, C. A.Oka, M.Okada, K.Onuki, Y.Oskarsson, A.Ouchida, M.Ozawa, K.Pak, R.Pantuev, V.Papavassiliou, V.Park, B. H.Park, I. H.Park, J.Park, S. K.Park, W. J.Pate, S. F.Patel, L.Pei, H.Peng, J. -C.Pereira, H.Peresedov, V.Peressounko, D. Yu.Petti, R.Pinkenburg, C.Pisani, R. P.Proissl, M.Purschke, M. L.Purwar, A. K.Qu, H.Rak, J.Rakotozafindrabe, A.Ravinovich, I.Read, K. F.Reygers, K.Reynolds, D.Riabov, V.Riabov, Y.Richardson, E.Riveli, N.Roach, D.Roche, G.Rolnick, S. D.Rosati, M.Rosen, C. A.Rosendahl, S. S. E.Rosnet, P.Rukoyatkin, P.Ruzicka, P.Sahlmueller, B.Saito, N.Sakaguchi, T.Sakashita, K.Samsonov, V.Sano, M.Sano, S.Sarsour, M.Sato, T.Sawada, S.Sedgwick, K.Seele, J.Seidl, R.Semenov, A. Yu.Sen, A.Seto, R.Sharma, D.Shein, I.Shibata, T. -A.Shigaki, K.Shimomura, M.Shoji, K.Shukla, P.Sickles, A.Silva, C. L.Silvermyr, D.Silvestre, C.Sim, K. S.Singh, B. K.Singh, C. P.Singh, V.Slunecka, M.Soltz, R. A.Sondheim, W. E.Sorensen, S. P.Soumya, M.Sourikova, I. V.Sparks, N. A.Stankus, P. W.Stenlund, E.Stepanov, M.Ster, A.Stoll, S. P.Sugitate, T.Sukhanov, A.Sun, J.Sziklai, J.Takagui, E. M.Takahara, A.Taketani, A.Tanabe, R.Tanaka, Y.Taneja, S.Tanida, K.Tannenbaum, M. J.Tarafdar, S.Taranenko, A.Tarjan, P.Tennant, E.Themann, H.Thomas, T. L.Todoroki, T.Togawa, M.Toia, A.Tomasek, L.Tomasek, M.Torii, H.Towell, R. S.Tserruya, I.Tsuchimoto, Y.Tsuji, T.Vale, C.Valle, H.van Hecke, H. W.Vargyas, M.Vazquez-Zambrano, E.Veicht, A.Velkovska, J.Vertesi, R.Vinogradov, A. A.Virius, M.Vossen, A.Vrba, V.Vznuzdaev, E.Wang, X. R.Watanabe, D.Watanabe, K.Watanabe, Y.Watanabe, Y. S.Wei, F.Wei, R.Wessels, J.Whitaker, S.White, S. N.Winter, D.Wolin, S.Wood, J. P.Woody, C. L.Wright, R. M.Wysocki, M.Xie, W.Yamaguchi, Y. L.Yamaura, K.Yang, R.Yanovich, A.Ying, J.Yokkaichi, S.You, Z.Young, G. R.Younus, I.Yushmanov, I. E.Zajc, W. A.Zelenski, A.Zhang, C.Zhou, S.Zolin, L.PHENIX Collaboration
Ewha Authors
한인식
SCOPUS Author ID
한인식scopus
Issue Date
2015
Journal Title
PHYSICAL REVIEW C
ISSN
2469-9985JCR Link

2469-9993JCR Link
Citation
PHYSICAL REVIEW C vol. 91, no. 6
Publisher
AMER PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au + Au collisions at root s(NN) = 200 GeV down to pT = 0.4 GeV/c. Photons are detected via photon conversions to e(+)e(-) pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low pT. We find an excess of direct photons above the N-coll-scaled yield measured in p + p collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/c in the pT range 0.6-2.0 GeV/c. While the shape of the pT distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with N-part(alpha), where alpha = 1.38 +/- 0.03(stat) +/- 0.07(syst).
DOI
10.1103/PhysRevC.91.064904
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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