/ Experiment-Nucl arXiv:1108.5400


Photon and Eta Production in p+Pb and p+C Collisions at $\sqrt{s_{NN}} = 17.4$ GeV


Aggarwal, M.M. (Panjab U.) ; Ahammed, Z. (Calcutta, VECC) ; Antonenko, V. (Kurchatov Inst., Moscow) ; Arefiev, V. (Dubna, JINR) ; Astakhov, V. (Dubna, JINR) ; Avdeitchikov, V. (Dubna, JINR) ; Awes, T.C. (Oak Ridge) ; Baba, P.V.K.S. (Jammu U.) ; Badyal, S.K. (Jammu U.) ; Bathe, S. (Munster U.) ; Batiounia, B. (Dubna, JINR) ; Baumann, C. (Munster U.) ; Bernier, T. (SUBATECH, Nantes) ; Bhalla, K.B. (Rajasthan U.) ; Bhatia, V.S. (Panjab U.) ; Blume, C. (Munster U.) ; Bucher, D. (Munster U.) ; Busching, H. (Munster U.) ; Carlen, L. (Lund U.) ; Chattopadhyay, S. (Calcutta, VECC) ; Decowski, M.P. (MIT) ; Delagrange, H. (SUBATECH, Nantes) ; Donni, P. (Geneva U.) ; Majumdar, M.R.Dutta (Calcutta, VECC) ; El Chenawi, K. (Lund U.) ; Dubey, A.K. (Bhubaneswar, Inst. Phys.) ; Enosawa, K. (Tsukuba U.) ; Fokin, S. (Kurchatov Inst., Moscow) ; Frolov, V. (Dubna, JINR) ; Ganti, M.S. (Calcutta, VECC) ; Gavrishchuk, O. (Dubna, JINR) ; Geurts, F.J.M. (NIKHEF, Amsterdam) ; Ghosh, T.K. (Groningen, KVI) ; Glasow, R. (Munster U.) ; Guskov, B. (Dubna, JINR) ; Gutbrod, H.H. (Darmstadt, GSI) ; Hrivnacova, I. (Rez, Nucl. Phys. Inst.) ; Ippolitov, M. (Kurchatov Inst., Moscow) ; Kalechofsky, H. (Geneva U.) ; Karadjev, K. (Kurchatov Inst., Moscow) ; Karpio, K. (Warsaw, Inst. Nucl. Studies) ; Kolb, B.W. (Darmstadt, GSI) ; Koutcheryaev, I. (Kurchatov Inst., Moscow) ; Kugler, A. (Rez, Nucl. Phys. Inst.) ; Kulinich, P. (MIT) ; Kurata, M. (Tsukuba U.) ; Lebedev, A. (Kurchatov Inst., Moscow) ; Lohner, H. (Groningen, KVI) ; Luquin, L. (SUBATECH, Nantes) ; Mahapatra, D.P. (Bhubaneswar, Inst. Phys.) ; Manko, V. (Kurchatov Inst., Moscow) ; Martin, M. (Geneva U.) ; Martinez, G. (SUBATECH, Nantes) ; Maximov, A. (Dubna, JINR) ; Miake, Y. (Tsukuba U.) ; Mishra, G.C. (Bhubaneswar, Inst. Phys.) ; Mohanty, B. (Bhubaneswar, Inst. Phys.) ; Mora, M.J. (SUBATECH, Nantes) ; Morrison, D. (Tennessee U.) ; Mukhanova, T. (Kurchatov Inst., Moscow) ; Mukhopadhyay, D.S. (Calcutta, VECC) ; Naef, H. (Geneva U.) ; Nandi, B.K. (Bhubaneswar, Inst. Phys.) ; Nayak, S.K. (Jammu U.) ; Nayak, T.K. (Calcutta, VECC) ; Nianine, A. (Kurchatov Inst., Moscow) ; Nikitine, V. (Dubna, JINR) ; Nikolaev, S. (Dubna, JINR) ; Nilsson, P. (Lund U.) ; Nishimura, S. (Tsukuba U.) ; Nomokonov, P. (Dubna, JINR) ; Nystrand, J. (Lund U.) ; Oskarsson, A. (Lund U.) ; Otterlund, I. (Lund U.) ; Pavliouk, S. (Dubna, JINR) ; Peitzmann, T. (NIKHEF, Amsterdam) ; Peressounko, D. (Kurchatov Inst., Moscow) ; Petracek, V. (Rez, Nucl. Phys. Inst.) ; Phatak, S.C. (Bhubaneswar, Inst. Phys.) ; Pinganaud, W. (SUBATECH, Nantes) ; Plasil, F. (Oak Ridge) ; Purschke, M.L. (Darmstadt, GSI) ; Rak, J. (Rez, Nucl. Phys. Inst.) ; Rammler, M. (Munster U.) ; Raniwala, R. (Rajasthan U.) ; Raniwala, S. (Rajasthan U.) ; Rao, N.K. (Jammu U.) ; Retiere, F. (SUBATECH, Nantes) ; Reygers, K. (Munster U.) ; Roland, G. (MIT) ; Rosselet, L. (Geneva U.) ; Roufanov, I. (Dubna, JINR) ; Roy, C. (SUBATECH, Nantes) ; Rubio, J.M. (Geneva U.) ; Sambyal, S.S. (Jammu U.) ; Santo, R. (Munster U.) ; Sato, S. (Tsukuba U.) ; Schlagheck, H. (Munster U.) ; Schmidt, H.R. (Darmstadt, GSI) ; Schutz, Y. (SUBATECH, Nantes) ; Shabratova, G. (Dubna, JINR) ; Shah, T.H. (Jammu U.) ; Sibiriak, I. (Kurchatov Inst., Moscow) ; Siemiarczuk, T. (Warsaw, Inst. Nucl. Studies) ; Silvermyr, D. (Lund U.) ; Sinha, B.C. (Calcutta, VECC) ; Slavine, N. (Dubna, JINR) ; Soderstrom, K. (Lund U.) ; Sood, G. (Panjab U.) ; Sorensen, S.P. (Tennessee U.) ; Stankus, P. (Oak Ridge) ; Stefanek, G. (Warsaw, Inst. Nucl. Studies) ; Steinberg, P. (MIT) ; Stenlund, E. (Lund U.) ; Sumbera, M. (Rez, Nucl. Phys. Inst.) ; Svensson, T. (Lund U.) ; Tsvetkov, A. (Kurchatov Inst., Moscow) ; Tykarski, L. (Warsaw, Inst. Nucl. Studies) ; Pijll, E.C.v.d. (NIKHEF, Amsterdam) ; Eijndhoven, N.v. (NIKHEF, Amsterdam) ; Nieuwenhuizen, G.J.v. (MIT) ; Vinogradov, A. (Kurchatov Inst., Moscow) ; Viyogi, Y.P. (Calcutta, VECC) ; Vodopianov, A. (Dubna, JINR) ; Voros, S. (Geneva U.) ; Wyslouch, B. (MIT) ; Young, G.R. (Oak Ridge)

Abstract: Measurements of direct photon production in p+Pb and p+C collisions at $\sqrt{s_\mathrm{NN}} = 17.4\mathrm{GeV}$ are presented. Upper limits on the direct photon yield as a function of $p_\mathrm{T}$ are derived and compared to the results for Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 17.3$ GeV. The production of the $\eta$ meson, which is an important input to the direct photon signal extraction, has been determined in the $\eta \rightarrow 2\gamma$ channel for p+C collisions at $\sqrt{s_\mathrm{NN}} = 17.4\mathrm{GeV}$.

Web-Page: http://inspirehep.net/record/925589/files/arXiv:1108.5400.pdf; http://inspirehep.net/record/925589/files/Fig1-pAIncGamma.png; http://inspirehep.net/record/925589/files/Fig2Ratios.png; http://inspirehep.net/record/925589/files/Fig3-pCEtaSpectra.png; http://inspirehep.net/record/925589/files/Fig4-eta_zu_pi0.png; http://inspirehep.net/record/925589/files/Fig5-DPpASpectra.png; http://inspirehep.net/record/925589/files/Fig6b_plotPbPbpANLOFrag.png


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