Article

Multiplicity and pseudorapidity distributions of photons in Au+Au collisions at square root of (S(NN)) = 62.4 GeV.

J Adams, M M Aggarwal, Z Ahammed, J Amonett, B D Anderson, D Arkhipkin, G S Averichev, S K Badyal, Y Bai, J Balewski, O Barannikova, L S Barnby, J Baudot, S Bekele, V V Belaga, A Bellingeri-Laurikainen, R Bellwied, J Berger, B I Bezverkhny, S Bhardwaj, A Bhasin, A K Bhati, H Bichsel, J Bielcik, J Bielcikova, A Billmeier, L C Bland, C O Blyth, S Blyth, B E Bonner, M Botje, A Boucham, J Bouchet, A V Brandin, A Bravar, M Bystersky, R V Cadman, X Z Cai, H Caines, M Calderón de la Barca Sánchez, J Castillo, O Catu, D Cebra, Z Chajecki, P Chaloupka, S Chattopadhyay, H F Chen, Y Chen, J Cheng, M Cherney, A Chikanian, W Christie, J P Coffin, T M Cormier, M R Cosentino, J G Cramer, H J Crawford, D Das, S Das, M M de Moura, T G Dedovich, A A Derevschikov, L Didenko, T Dietel, S M Dogra, W J Dong, X Dong, J E Draper, F Du, A K Dubey, V B Dunin, J C Dunlop, M R Dutta Mazumdar, V Eckardt, W R Edwards, L G Efimov, V Emelianov, J Engelage, G Eppley, B Erazmus, M Estienne, P Fachini, J Faivre, R Fatemi, J Fedorisin, K Filimonov, P Filip, E Finch, V Fine, Y Fisyak, K S F Fornazier, J Fu, C A Gagliardi, L Gaillard, J Gans, M S Ganti, F Geurts, V Ghazikhanian, P Ghosh, J E Gonzalez, H Gos, O Grachov, O Grebenyuk, D Grosnick, S M Guertin, Y Guo, A Gupta, T D Gutierrez, T J Hallman, A Hamed, D Hardtke, J W Harris, M Heinz, T W Henry, S Hepplemann, B Hippolyte, A Hirsch, E Hjort, G W Hoffmann, M Horner, H Z Huang, S L Huang, E W Hughes, T J Humanic, G Igo, A Ishihara, P Jacobs, W W Jacobs, M Jedynak, H Jiang, P G Jones, E G Judd, S Kabana, K Kang, M Kaplan, D Keane, A Kechechyan, V Yu Khodyrev, J Kiryluk, A Kisiel, E M Kislov, J Klay, S R Klein, D D Koetke, T Kollegger, M Kopytine, L Kotchenda, K L Kowalik, M Kramer, P Kravtsov, V I Kravtsov, K Krueger, C Kuhn, A I Kulikov, A Kumar, R Kh Kutuev, A A Kuznetsov, M A C Lamont, J M Landgraf, S Lange, F Laue, J Lauret, A Lebedev, R Lednicky, S Lehocka, M J Levine, C Li, Q Li, Y Li, G Lin, S J Lindenbaum, M A Lisa, F Liu, H Liu, J Liu, L Liu, Q J Liu, Z Liu, T Ljubicic, W J Llope, H Long, R S Longacre, M Lopez-Noriega, W A Love, Y Lu, T Ludlam, D Lynn, G L Ma, J G Ma, Y G Ma, D Magestro, S Mahajan, D P Mahapatra, R Majka, L K Mangotra, R Manweiler, S Margetis, C Markert, L Martin, J N Marx, H S Matis, Yu A Matulenko, C J McClain, T S McShane, F Meissner, Yu Melnick, A Meschanin, M L Miller, N G Minaev, C Mironov, A Mischke, D K Mishra, J Mitchell, B Mohanty, L Molnar, C F Moore, D A Morozov, M G Munhoz, B K Nandi, S K Nayak, T K Nayak, J M Nelson, P K Netrakanti, V A Nikitin, L V Nogach, S B Nurushev, G Odyniec, A Ogawa, V Okorokov, M Oldenburg, D Olson, S K Pal, Y Panebratsev, S Y Panitkin, A I Pavlinov, T Pawlak, T Peitzmann, V Perevoztchikov, C Perkins, W Peryt, V A Petrov, S C Phatak, R Picha, M Planinic, J Pluta, N Porile, J Porter, A M Poskanzer, M Potekhin, E Potrebenikova, B V K S Potukuchi, D Prindle, C Pruneau, J Putschke, G Rakness, R Raniwala, S Raniwala, O Ravel, R L Ray, S V Razin, D Reichhold, J G Reid, J Reinnarth, G Renault, F Retiere, A Ridiger, H G Ritter, J B Roberts, O V Rogachevskiy, J L Romero, A Rose, C Roy, L Ruan, M J Russcher, R Sahoo, I Sakrejda, S Salur, J Sandweiss, M Sarsour, I Savin, P S Sazhin, J Schambach, R P Scharenberg, N Schmitz, K Schweda, J Seger, P Seyboth, E Shahaliev, M Shao, W Shao, M Sharma, W Q Shen, K E Shestermanov, S S Shimanskiy, E Sichtermann, F Simon, R N Singaraju, N Smirnov, R Snellings, G Sood, P Sorensen, J Sowinski, J Speltz, H M Spinka, B Srivastava, A Stadnik, T D S Stanislaus, R Stock, A Stolpovsky, M Strikhanov, B Stringfellow, A A P Suaide, E Sugarbaker, C Suire, M Sumbera, B Surrow, M Swanger, T J M Symons, A Szanto de Toledo, A Tai, J Takahashi, A H Tang, T Tarnowsky, D Thein, J H Thomas, S Timoshenko, M Tokarev, T A Trainor, S Trentalange, R E Tribble, O D Tsai, J Ulery, T Ullrich, D G Underwood, G Van Buren, M van Leeuwen, A M Vander Molen, R Varma, I M Vasilevski, A N Vasiliev, R Vernet, S E Vigdor, Y P Viyogi, S Vokal, S A Voloshin, W T Waggoner, F Wang, G Wang, X L Wang, Y Wang, Z M Wang, H Ward, J W Watson, J C Webb, G D Westfall, A Wetzler, C Whitten, H Wieman, S W Wissink, R Witt, J Wood, J Wu, N Xu, Z Xu, Z Z Xu, E Yamamoto, P Yepes, V I Yurevich, I Zborovsky, H Zhang, W M Zhang, Y Zhang, Z P Zhang, R Zoulkarneev, Y Zoulkarneeva, A N Zubarev

University of Birmingham, Birmingham, United Kingdom.
Physical Review Letters (impact factor: 7.37). 08/2005; 95(6):062301. pp.062301
Source: PubMed

ABSTRACT We present the first measurement of pseudorapidity distribution of photons in the region 2.3 < or = eta < or = 3.7 for different centralities in Au+Au collisions at square root of (S(NN)) = 62.4 GeV. We find that the photon yield scales with the number of participating nucleons at all collision centralities studied. The pseudorapidity distribution of photons, dominated by pi0 decays, has been compared to those of charged pions, photons, and inclusive charged particles from heavy-ion and nucleon-nucleon collisions at various energies. The photon production has been shown to be consistent with the energy and centrality independent limiting fragmentation scenario.

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Keywords

Au+Au collisions
 
centrality independent
 
different centralities
 
first measurement
 
heavy-ion
 
inclusive
 
nucleon-nucleon collisions
 
nucleons
 
photon yield scales
 
pseudorapidity distribution
 
various energies
 

J Adams