Inclusive π0, η, and direct photon production at high transverse momentum in p+p and d+Au collisions at √sNN=200 GeV

Abelev, B.; Aggarwal, M.; Ahammed, Z.; Alakhverdyants, A.; Anderson, B.; Arkhipkin, D.; Averichev, G.; Balewski, J.; Barannikova, O.; Barnby, L.; Baumgart, S.; Beavis, D.; Bellwied, R.; Benedosso, F.; Betancourt, M.; Betts, R.; Bhasin, A.; Bhati, A.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Biritz, B.; Bland, L.; Bonner, B.; Bouchet, J.; Braidot, E.; Brandin, A.; Bridgeman, A.; Bruna, E.; Bueltmann, S.; Bunzarov, I.; Burton, T.; Cai, X.; Caines, H.; Calderón de la Barca Sánchez, M.; Catu, O.; Cebra, D.; Cendejas, R.; Cervantes, M.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H.; Chen, J.; Chen, J.; Cheng, J.; Cherney, M.; Chikanian, A.; Choi, K.; Christie, W.; Chung, P.; Clarke, R.; Codrington, M.; Corliss, R.; Cramer, J.; Crawford, H.; Das, D.; Dash, S.; Davila Leyva, A.; De Silva, L.; Debbe, R.; Dedovich, T.; DePhillips, M.; Derevschikov, A.; Derradi de Souza, R.; Didenko, L.; Djawotho, P.; Dogra, S.; Dong, X.; Drachenberg, J.; Draper, J.; Dunlop, J.; Dutta Mazumdar, M.; Efimov, L.; Elhalhuli, E.; Elnimr, M.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Eun, L.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Fersch, R.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Gagliardi, C.; Gangadharan, D.; Ganti, M.; Garcia-Solis, E.; Geromitsos, A.; Geurts, F.; Ghazikhanian, V.; Ghosh, P.; Gorbunov, Y.; Gordon, A.; Grebenyuk, O.; Grosnick, D.; Grube, B.; Guertin, S.; Gupta, A.; Gupta, N.; Guryn, W.; Haag, B.; Hallman, T.; Hamed, A.; Han, L.-X.; Harris, J.; Hays-Wehle, J.; Heinz, M.; Heppelmann, S.; Hirsch, A.; Hjort, E.; Hoffman, A.; Hoffmann, G.; Hofman, D.; Hollis, R.; Huang, H.; Humanic, T.; Huo, L.; Igo, G.; Iordanova, A.; Jacobs, P.; Jacobs, W.; Jakl, P.; Jena, C.; Jin, F.; Jones, C.; Jones, P.; Joseph, J.; Judd, E.; Kabana, S.; Kajimoto, K.; Kang, K.; Kapitan, J.; Kauder, K.; Keane, D.; Kechechyan, A.; Kettler, D.; Kikola, D.; Kiryluk, J.; Kisiel, A.; Klein, S.; Knospe, A.; Kocoloski, A.; Koetke, D.; Kollegger, T.; Konzer, J.; Kopytine, M.; Koralt, I.; Korsch, W.; Kotchenda, L.; Kouchpil, V.; Kravtsov, P.; Krueger, K.; Krus, M.; Kumar, L.; Kurnadi, P.; Lamont, M.; Landgraf, J.; LaPointe, S.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, C.-H.; Lee, J.; Leight, W.; LeVine, M.; Li, C.; Li, L.; Li, N.; Li, W.; Li, X.; Li, X.; Li, Y.; Li, Z.; Lin, G.; Lindenbaum, S.; Lisa, M.; Liu, F.; Liu, H.; Liu, J.; Ljubicic, T.; Llope, W.; Longacre, R.; Love, W.; Lu, Y.; Ma, G.; Ma, Y.; Mahapatra, D.; Majka, R.; Mall, O.; Mangotra, L.; Manweiler, R.; Margetis, S.; Markert, C.; Masui, H.; Matis, H.; Matulenko, Yu.; McDonald, D.; McShane, T.; Meschanin, A.; Milner, R.; Minaev, N.; Mioduszewski, S.; Mischke, A.; Mitrovski, M.; Mohanty, B.; Mondal, M.; Morozov, D.; Munhoz, M.; Nandi, B.; Nattrass, C.; Nayak, T.; Nelson, J.; Netrakanti, P.; Ng, M.; Nogach, L.; Nurushev, S.; Odyniec, G.; Ogawa, A.; Okada, H.; Okorokov, V.; Olson, D.; Pachr, M.; Page, B.; Pal, S.; Pandit, Y.; Panebratsev, Y.; Pawlak, T.; Peitzmann, T.; Perevoztchikov, V.; Perkins, C.; Peryt, W.; Phatak, S.; Pile, P.; Planinic, M.; Ploskon, M.; Pluta, J.; Plyku, D.; Poljak, N.; Poskanzer, A.; Potukuchi, B.; Powell, C.; Prindle, D.; Pruneau, C.; Pruthi, N.; Pujahari, P.; Putschke, J.; Raniwala, R.; Raniwala, S.; Ray, R.; Redwine, R.; Reed, R.; Rehberg, J.; Ritter, H.; Roberts, J.; Rogachevskiy, O.; Romero, J.; Rose, A.; Roy, C.; Ruan, L.; Russcher, M.; Sahoo, R.; Sakai, S.; Sakrejda, I.; Sakuma, T.; Salur, S.; Sandweiss, J.; Sangaline, E.; Schambach, J.; Scharenberg, R.; Schmitz, N.; Schuster, T.; Seele, J.; Seger, J.; Selyuzhenkov, I.; Seyboth, P.; Shahaliev, E.; Shao, M.; Sharma, M.; Shi, S.; Sichtermann, E.; Simon, F.; Singaraju, R.; Skoby, M.; Smirnov, N.; Sorensen, P.; Sowinski, J.; Spinka, H.; Srivastava, B.; Stanislaus, T.; Staszak, D.; Stevens, J.; Stock, R.; Strikhanov, M.; Stringfellow, B.; Suaide, A.; Suarez, M.; Subba, N.; Sumbera, M.; Sun, X.; Sun, Y.; Sun, Z.; Surrow, B.; Symons, T.; Szanto de Toledo, A.; Takahashi, J.; Tang, A.; Tang, Z.; Tarini, L.; Tarnowsky, T.; Thein, D.; Thomas, J.; Tian, J.; Timmins, A.; Timoshenko, S.; Tlusty, D.; Tokarev, M.; Trainor, T.; Tram, V.; Trentalange, S.; Tribble, R.; Tsai, O.; Ulery, J.; Ullrich, T.; Underwood, D.; Van Buren, G.; van Nieuwenhuizen, G.; Vanfossen, J.; Varma, R.; Vasconcelos, G.; Vasiliev, A.; Videbaek, F.; Viyogi, Y.; Vokal, S.; Voloshin, S.; Wada, M.; Walker, M.; Wang, F.; Wang, G.; Wang, H.; Wang, J.; Wang, Q.; Wang, X.; Wang, X.; Wang, Y.; Webb, G.; Webb, J.; Westfall, G.; Whitten, C.; Wieman, H.; Wingfield, E.; Wissink, S.; Witt, R.; Wu, Y.; Xie, W.; Xu, N.; Xu, Q.; Xu, W.; Xu, Y.; Xu, Z.; Xue, L.; Yang, Y.; Yepes, P.; Yip, K.; Yoo, I.-K.; Yue, Q.; Zawisza, M.; Zbroszczyk, H.; Zhan, W.; Zhang, S.; Zhang, W.; Zhang, X.; Zhang, Y.; Zhang, Z.; Zhao, J.; Zhong, C.; Zhou, J.; Zhou, W.; Zhu, X.; Zhu, Y.; Zoulkarneev, R.; Zoulkarneeva, Y.

Author(s)

Balewski, Jan T.; Betancourt, Michael Joseph; Corliss, Ross Cameron; Hays-Wehle, James Prewitt; Jones, Christopher LaDon; ... Show more

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Abstract

We report a measurement of high-p[subscript T] inclusive π [pi][superscript 0], η[eta], and direct photon production in p+p and d+Au collisions at √s[subscript NN]=200 GeV at midrapidity (0<η[eta]<1). Photons from the decay π[pi][superscript 0]→γγ were detected in the barrel electromagnetic calorimeter of the STAR experiment at the Relativistic Heavy Ion Collider. The η[eta]→γγ decay was also observed and constituted the first η[eta] measurement by STAR. The first direct photon cross-section measurement by STAR is also presented; the signal was extracted statistically by subtracting the π[pi] [superscript 0], η[eta], and ω[omega](782) decay background from the inclusive photon distribution observed in the calorimeter. The analysis is described in detail, and the results are found to be in good agreement with earlier measurements and with next-to-leading-order perturbative QCD calculations.

Date issued

2010-06

URI

http://hdl.handle.net/1721.1/60665

Department

Bates Linear Accelerator Center; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

Physical Review C

Publisher

American Physical Society

Citation

Abelev, B. et al. “Inclusive π^{0}, η, and direct photon production at high transverse momentum in p+p and d+Au collisions at sqrt[s_{NN}]=200 GeV.” Physical Review C 81.6 (2010): n. pag. © 2010 The American Physical Society

Version: Final published version

ISSN

0556-2813

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