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Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisionsopen access

Authors
Adare, A.Afanasiev, S.Aidala, C.Ajitanand, N. N.Akiba, Y.Akimoto, R.Al-Bataineh, H.Alexander, J.Alfred, M.Al-Jamel, A.Al-Ta'ani, H.Angerami, A.Aoki, K.Apadula, N.Aphecetche, L.Aramaki, Y.Armendariz, R.Aronson, S. H.Asai, J.Asano, H.Aschenauer, E. C.Atomssa, E. T.Averbeck, R.Awes, T. C.Azmoun, B.Babintsev, VBagoly, A.Bai, M.Baksay, G.Baksay, L.Baldisseri, A.Bannier, B.Barish, K. N.Barnes, P. D.Bassalleck, B.Basye, A. T.Bathe, S.Batsouli, S.Baublis, VBauer, F.Baumann, C.Baumgart, S.Bazilevsky, A.Belikov, S.Belmont, R.Bennett, R.Berdnikov, A.Berdnikov, Y.Bhom, J. H.Bickley, A. A.Bjorndal, M. T.Blau, D. S.Boer, M.Boissevain, J. G.Bok, J. S.Borel, H.Boyle, K.Brooks, M. L.Brown, D. S.Bryslawskyj, J.Bucher, D.Buesching, H.Bumazhnov, VBunce, G.Burward-Hoy, J. M.Butsyk, S.Camacho, C. M.Campbell, S.Roman, V. CanoaCaringi, A.Castera, P.Chai, J-SChang, B. S.Chang, W. C.Charvet, J-LChen, C-HChernichenko, S.Chi, C. Y.Chiba, J.Chiu, M.Choi, I. J.Choi, J. B.Choi, S.Choudhury, R. K.Christiansen, P.Chujo, T.Chung, P.Churyn, A.Chvala, O.Cianciolo, VCitron, Z.Cleven, C. R.Cobigo, Y.Cole, B. A.Comets, M. P.del Valle, Z. ConesaConnors, M.Constantin, P.Csanad, M.Csorgo, T.Dahms, T.Dairaku, S.Danchev, IDanley, T. W.Das, K.Datta, A.Daugherity, M. S.David, G.Dayananda, M. K.Deaton, M. B.Dehmelt, K.Delagrange, H.Denisov, A.d'Enterria, D.Deshpande, A.Desmond, E. J.Dharmawardane, K., VDietzsch, O.Ding, L.Dion, A.Do, J. H.Donadelli, M.D'Orazio, L.Drachenberg, J. L.Drapier, O.Drees, A.Drees, K. A.Dubey, A. K.Durham, J. M.Durum, A.Dutta, D.Dzhordzhadze, VEdwards, S.Efremenko, Y., VEgdemir, J.Ellinghaus, F.Emam, W. S.Engelmore, T.Enokizono, A.En'yo, H.Espagnon, B.Esumi, S.Eyser, K. O.Fadem, B.Fan, W.Feege, N.Fields, D. E.Finger, M.Finger, M., Jr.Fleuret, F.Fokin, S. L.Forestier, B.Fraenkel, Z.Frantz, J. E.Franz, A.Frawley, A. D.Fujiwara, K.Fukao, Y.Fung, S-YFusayasu, T.Gadrat, S.Gainey, K.Gal, C.Gallus, P.Garg, P.Garishvili, A.Garishvili, IGastineau, F.Ge, H.Germain, M.Glenn, A.Gong, H.Gong, X.Gonin, M.Gosset, J.Goto, Y.de Cassagnac, R. GranierGrau, N.Greene, S., VGrim, G.Perdekamp, M. GrosseGunji, T.Guo, L.Gustafsson, H-AHachiya, T.Henni, A. HadjHaegemann, C.Haggerty, J. S.Hagiwara, M. N.Hahn, K., IHamagaki, H.Hamblen, J.Han, R.Hanks, J.Harada, H.Hartouni, E. P.Hanma, K.Harvey, M.Hasegawa, S.Haseler, T. O. S.Hashimoto, K.Haslum, E.Hasuko, K.Hayano, R.He, X.Heffner, M.Hemmick, T. K.Hester, T.Heuser, J. M.Hiejima, H.Hill, J. C.Hill, K.Hobbs, R.Hodges, A.Hohlmann, M.Hollis, R. S.Holmes, M.Holzmann, W.Homma, K.Hong, B.Horaguchi, T.Hori, Y.Hornback, D.Hotvedt, N.Huang, J.Huang, S.Hur, M. G.Ichihara, T.Khimiya, R.Iinuma, H.Ikeda, Y.Imai, K.Imrek, J.Inaba, M.Inoue, Y.Iordanova, A.Isenhower, D.Isenhower, L.Ishihara, M.Isobe, T.Issah, M.Isupov, A.Ivanishchev, D.Iwanaga, Y.Jacak, B., VJavani, M.Ji, Z.Jia, J.Jiang, X.Jin, J.Jinnouchi, O.Johnson, B. M.Jones, T.Joo, K. S.Jouan, D.Jumper, D. S.Kajihara, F.Kametani, S.Kamihara, N.Kamin, J.Kaneta, M.Kaneti, S.Kang, B. H.Kang, J. H.Kang, J. S.Kanou, H.Kapustinsky, J.Karatsu, K.Kasai, M.Kawagishi, T.Kawall, D.Kawashima, M.Kazantsev, A., VKelly, S.Kempel, T.Khachatryan, VKhanzadeev, A.Kijima, K. M.Kikuchi, J.Kim, A.Kim, B., IKim, C.Kim, D. H.Kim, D. J.Kim, E.Kim, E-JICim, H. J.Kim, K-BKim, M.Kim, S. H.Kim, Y-JKim, Yong KyunKim, Y-SKincses, D.Kinney, E.Kiriluk, K.Kiss, A.Kistenev, E.Kiyomichi, A.Klatsky, J.Klay, J.Klein-Boesing, C.Kleinjan, D.Kline, P.Kochenda, L.Kochetkov, VKomatsu, Y.Komkov, B.Konno, M.Koster, J.Kotchetkov, D.Kotov, D.Kozlov, A.Kral, A.Kravitz, A.Krizek, F.Kroon, P. J.Kubart, J.Kunde, G. J.Kurgyis, B.Kurihara, N.Kurita, K.Kurosawa, M.Kweon, M. J.Kwon, Y.Kyle, G. S.Lacey, R.Lai, Y. S.Lajoie, J. G.Layton, D.Lebedev, A.Le Bornec, Y.Leckey, S.Lee, B.Lee, D. M.Lee, J.Lee, K. B.Lee, K. S.Lee, M. K.Lee, S. H.Lee, S. R.Lee, T.Leitch, M. J.Leite, M. A. L.Leitgab, M.Lenzi, B.Leung, Y. H.Lewis, B.Lewis, N. A.Li, X.Li, X. H.Lichtenwalner, P.Liebing, P.Lim, H.Lim, S. H.Levy, L. A. LindenLiska, T.Litvinenko, A.Liu, H.Liu, M. X.Lokos, S.Love, B.Lynch, D.Maguire, C. F.Majoros, T.Makdisi, Y., IMakek, M.Malalchov, A.Malik, M. D.Manion, A.Manko, V., IMannel, E.Ma, Y.Masek, L.Masui, H.Masumoto, S.Matathias, F.McCain, M. C.McCumber, M.McGaughey, P. L.McGlinchey, D.McKinney, C.Means, N.Mendoza, M.Meredith, B.Miake, Y.Mibe, T.Mignerey, A. C.Milialik, D. E.Mikes, P.Miki, K.Miller, T. E.Milov, A.Mioduszewski, S.Mishra, D. K.Mishra, G. C.Mishra, M.Mitchell, J. T.Mitrovski, M.Mitsuka, G.Miyachi, Y.Miyasaka, S.Mohanty, A. K.Mohapatra, S.Moon, H. J.Moon, T.Morino, Y.Morreale, A.Morrison, D. P.Morrow, S., IMoss, J. M.Motschwiller, S.Moukhanova, T., VMukhopadhyay, D.Murakami, T.Murata, J.Mwai, A.Nagae, T.Nagamiya, S.Nagashima, K.Nagata, Y.Nagle, J. L.Naglis, M.Nagy, M., INakagawa, INakamiya, Y.Nakamura, K. R.Nakamura, T.Nakano, K.Nam, S.Nattrass, C.Nederlof, A.Newby, J.Nguyen, M.Nihashi, M.Niida, T.Norman, B. E.Nouicer, R.Novak, T.Novitzky, N.Nyanin, A. S.Nystrand, J.Oakley, C.O'Brien, E.Oda, S. X.Ogilvie, C. A.Ohnishi, H.Ojha, I. D.Oka, M.Okada, K.Omiwade, O. O.Onuki, Y.Koop, J. D. OrjuelaOsborn, J. D.Oskarsson, A.Otterlund, IOuchida, M.Ozawa, K.Pak, R.Pal, D.Palounek, A. P. T.Panniev, VPapavassiliou, VPark, B. H.Park, I. H.Park, J.Park, S.Park, S. K.Park, W. J.Pate, S. F.Patel, L.Patel, M.Pei, H.Peng, J-CPeng, W.Pereira, H.Perepelitsa, D., VPeresedov, VPeressounko, D. YuPerezLara, C. E.Petti, R.Pinkenburg, C.Pisani, R. P.Proissl, M.Purschke, M. L.Purwar, A. K.Qu, H.Radzevich, P., VRak, J.Rakotozafindrabe, A.Ravinovich, IRead, K. F.Rembeczki, S.Reuter, M.Reygers, K.Reynolds, D.Riabov, VRiabov, Y.Richardson, E.Richford, D.Rinn, T.Roach, D.Roche, G.Rolnick, S. D.Romana, A.Rosati, M.Rosen, C. A.Rosendahl, S. S. E.Rosnet, P.Rowan, Z.Rukoyatkin, P.Runchey, J.Ruzicka, P.Rykov, V. L.Ryu, S. S.Sahlmueller, B.Saito, N.Sakaguchi, T.Sakai, S.Sakashita, K.Sakata, H.Sako, H.Samsonov, VSano, M.Sano, S.Sarsour, M.Sato, H. D.Sato, S.Sato, T.Sawada, S.Schmoll, B. K.Sedgwick, K.Seele, J.Seidl, R.Semenov, A. YuSemenov, VSen, A.Seto, R.Sharma, D.Shea, T. K.Shein, IShevel, A.Shibata, T-AShigaki, 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, VSkoby, M. J.Skutnik, S.Slunecka, M.Smith, W. C.Soldatov, A.Soltz, R. A.Sondheim, W. E.Sorensen, S. P.Sourikova, I., VStaley, F.Stankus, P. W.Stenlund, E.Stepanov, M.Ster, A.Stoll, S. P.Sugitate, T.Suire, C.Sukhanov, A.Sullivan, J. P.Sun, J.Sun, Z.Sziklai, J.Tabaru, T.Takagi, S.Takagui, E. M.Takahara, A.Taketani, A.Tanabe, R.Tanaka, K. H.Tanaka, Y.Taneja, S.Tanida, K.Tannenbaum, M. J.Tarafdar, S.Taranenko, A.Tarjan, P.Tennant, E.Themann, H.Thomas, D.Thomas, T. L.Tieulent, R.Todoroki, T.Togawa, M.Toia, A.Tojo, J.Tomasek, L.Tomasek, M.Tomita, Y.Torii, H.Towell, R. S.Tram, V-NTserruya, ITsuchimoto, Y.Tsuji, T.Tuli, S. K.Tydesjo, H.Tyurin, N.Ueda, Y.Ujvari, B.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.Wagner, M.Walker, D.Wang, X. R.Watanabe, D.Watanabe, K.Watanabe, Y.Watanabe, Y. S.Wei, F.Wei, R.Wessels, J.White, S. N.Willis, N.Winter, D.Wolin, S.Wong, C. P.Woody, C. L.Wright, R. M.Wysocki, M.Xia, B.Xie, W.Xu, C.Xu, Q.Yamaguchi, Y. L.Yamaura, K.Yang, R.Yanovich, A.Yasin, Z.Ying, J.Yokkaichi, S.Yoo, J. H.You, Z.Young, G. R.Younus, IYu, H.Yushmanov, I. E.Zajc, W. A.Zaudtke, O.Zelenski, A.Zhang, C.Zharko, S.Zhou, S.Zimamyi, J.Zolin, L.Zou, L.
Issue Date
Jul-2019
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.123, no.2, pp.1 - 10
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW LETTERS
Volume
123
Number
2
Start Page
1
End Page
10
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/13379
DOI
10.1103/PhysRevLett.123.022301
ISSN
0031-9007
Abstract
The PHENIX collaboration presents first measurements of low-momentum (0.4 < p(T) < 3 GeV/c) direct-photon yields from Au + Au collisions at root s(NN) =39 and 62.4 GeV. For both beam energies the direct-photon yields are substantially enhanced with respect to expectations from prompt processes, similar to the yields observed in Au +horn Au collisions at root s(NN) =200. Analyzing the photon yield as a function of the experimental observable dN(ch)/d(eta) eveals that the low-momentum (> 1 GeV= c) direct-photon yield dN(gamma)(dir)/d(eta) is a smooth function f dN(ch)/d eta and can be well described as proportional to (dN(ch)/d(eta))(alpha) with a approximate to 1.25. This scaling behavior holds for a wide range of beam energies at the Relativistic Heavy Ion Collider and the Large Hadron Collider, for centrality selected samples, as well as for different A thorn A collision systems. At a given beam energy, the scaling also holds for high p(T) (> 5 GeV= c), but when results from different collision energies are compared, an additional root s(NN) -dependent multiplicative factor is needed to describe the integrated-direct-photon yield.
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