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Measurement of single muons at forward rapidity in p+p collisions at s=200  GeV and implications for charm production

S. S. Adler5, S. Afanasiev17, C. Aidala5, N. N. Ajitanand43, Y. Akiba20,38, J. Alexander43, R. Amirikas12, L. Aphecetche45, S. H. Aronson5 et al. (PHENIX Collaboration)

S. H. Aronson5, R. Averbeck44, T. C. Awes35, R. Azmoun44, V. Babintsev15, A. Baldisseri10, K. N. Barish6, P. D. Barnes27, B. Bassalleck33, S. Bathe30, S. Batsouli9, V. Baublis37, A. Bazilevsky39,15, S. Belikov16,15,*, Y. Berdnikov40, S. Bhagavatula16, J. G. Boissevain27, H. Borel10, S. Borenstein25, M. L. Brooks27, D. S. Brown34, N. Bruner33, D. Bucher30, H. Buesching30, V. Bumazhnov15, G. Bunce5,39, J. M. Burward-Hoy26,44, S. Butsyk44, X. Camard45, J.-S. Chai18, P. Chand4, W. C. Chang2, S. Chernichenko15, C. Y. Chi9, J. Chiba20, M. Chiu9, I. J. Choi52, J. Choi19, R. K. Choudhury4, T. Chujo5, V. Cianciolo35, Y. Cobigo10, B. A. Cole9, P. Constantin16, D. d’Enterria45, G. David5, H. Delagrange45, A. Denisov15, A. Deshpande39, E. J. Desmond5, A. Devismes44, O. Dietzsch41, O. Drapier25, A. Drees44, K. A. Drees5, R. du Rietz29, A. Durum15, D. Dutta4, Y. V. Efremenko35, K. El Chenawi49, A. Enokizono14, H. En’yo38,39, S. Esumi48, L. Ewell5, D. E. Fields33,39, F. Fleuret25, S. L. Fokin23, B. D. Fox39, Z. Fraenkel51, J. E. Frantz9, A. Franz5, A. D. Frawley12, S.-Y. Fung6, S. Garpman29,*, T. K. Ghosh49, A. Glenn46, G. Gogiberidze46, M. Gonin25, J. Gosset10, Y. Goto39, R. Granier de Cassagnac25, N. Grau16, S. V. Greene49, M. Grosse Perdekamp39, W. Guryn5, H.-Å. Gustafsson29, T. Hachiya14, J. S. Haggerty5, H. Hamagaki8, A. G. Hansen27, E. P. Hartouni26, M. Harvey5, R. Hayano8, N. Hayashi38, X. He13, M. Heffner26, T. K. Hemmick44, J. M. Heuser44, M. Hibino50, J. C. Hill16, W. Holzmann43, K. Homma14, B. Hong22, A. Hoover34, D. Hornback46, T. Ichihara38,39, V. V. Ikonnikov23, K. Imai24,38, D. Isenhower1, M. Ishihara38, M. Issah43, A. Isupov17, B. V. Jacak44, W. Y. Jang22, Y. Jeong19, J. Jia44, O. Jinnouchi38, B. M. Johnson5, S. C. Johnson26, K. S. Joo31, D. Jouan36, S. Kametani8,50, N. Kamihara38,47, J. H. Kang52, S. S. Kapoor4, K. Katou50, S. Kelly9, B. Khachaturov51, A. Khanzadeev37, J. Kikuchi50, D. H. Kim31, D. J. Kim52, D. W. Kim19, E. Kim42, G.-B. Kim25, H. J. Kim52, E. Kistenev5, A. Kiyomichi48, K. Kiyoyama32, C. Klein-Boesing30, H. Kobayashi38,39, L. Kochenda37, V. Kochetkov15, D. Koehler33, T. Kohama14, M. Kopytine44, D. Kotchetkov6, A. Kozlov51, P. J. Kroon5, C. H. Kuberg1,27,*, K. Kurita39, Y. Kuroki48, M. J. Kweon22, Y. Kwon52, G. S. Kyle34, R. Lacey43, V. Ladygin17, J. G. Lajoie16, A. Lebedev16,23, S. Leckey44, D. M. Lee27, S. Lee19, M. J. Leitch27, X. H. Li6, H. Lim42, A. Litvinenko17, M. X. Liu27, Y. Liu36, C. F. Maguire49, Y. I. Makdisi5, A. Malakhov17, V. I. Manko23, Y. Mao7,38, G. Martinez45, M. D. Marx44, H. Masui48, F. Matathias44, T. Matsumoto8,50, P. L. McGaughey27, E. Melnikov15, F. Messer44, Y. Miake48, J. Milan43, T. E. Miller49, A. Milov44,51, S. Mioduszewski5, R. E. Mischke27, G. C. Mishra13, J. T. Mitchell5, A. K. Mohanty4, D. P. Morrison5, J. M. Moss27, F. Mühlbacher44, D. Mukhopadhyay51, M. Muniruzzaman6, J. Murata38,39, S. Nagamiya20, J. L. Nagle9, T. Nakamura14, B. K. Nandi6, M. Nara48, J. Newby46, P. Nilsson29, A. S. Nyanin23, J. Nystrand29, E. O’Brien5, C. A. Ogilvie16, H. Ohnishi5,38, I. D. Ojha3,49, K. Okada38, M. Ono48, V. Onuchin15, A. Oskarsson29, I. Otterlund29, K. Oyama8, K. Ozawa8, D. Pal51, A. P. T. Palounek27, V. Pantuev44, V. Papavassiliou34, J. Park42, A. Parmar33, S. F. Pate34, T. Peitzmann30, J.-C. Peng27, V. Peresedov17, C. Pinkenburg5, R. P. Pisani5, F. Plasil35, M. L. Purschke5, A. K. Purwar44, J. Rak16, I. Ravinovich51, K. F. Read35,46, M. Reuter44, K. Reygers30, V. Riabov37,40, Y. Riabov37, G. Roche28, A. Romana25,*, M. Rosati16, P. Rosnet28, S. S. Ryu52, M. E. Sadler1, N. Saito38,39, T. Sakaguchi8,50, M. Sakai32, S. Sakai48, V. Samsonov37, L. Sanfratello33, R. Santo30, H. D. Sato24,38, S. Sato5,48, S. Sawada20, Y. Schutz45, V. Semenov15, R. Seto6, M. R. Shaw1,27, T. K. Shea5, T.-A. Shibata38,47, K. Shigaki14,20, T. Shiina27, C. L. Silva41, D. Silvermyr27,29, K. S. Sim22, C. P. Singh3, V. Singh3, M. Sivertz5, A. Soldatov15, R. A. Soltz26, W. E. Sondheim27, S. P. Sorensen46, I. V. Sourikova5, F. Staley10, P. W. Stankus35, E. Stenlund29, M. Stepanov34, A. Ster21, S. P. Stoll5, T. Sugitate14, J. P. Sullivan27, E. M. Takagui41, A. Taketani38,39, M. Tamai50, K. H. Tanaka20, Y. Tanaka32, K. Tanida38, M. J. Tannenbaum5, P. Tarján11, J. D. Tepe1,27, T. L. Thomas33, J. Tojo24,38, H. Torii24,38, R. S. Towell1, I. Tserruya51, H. Tsuruoka48, S. K. Tuli3, H. Tydesjö29, N. Tyurin15, H. W. van Hecke27, J. Velkovska5,44, M. Velkovsky44, V. Veszprémi11, L. Villatte46, A. A. Vinogradov23, M. A. Volkov23, E. Vznuzdaev37, X. R. Wang13, Y. Watanabe38,39, S. N. White5, F. K. Wohn16, C. L. Woody5, W. Xie6, Y. Yang7, A. Yanovich15, S. Yokkaichi38,39, G. R. Young35, I. E. Yushmanov23, W. A. Zajc9,†, C. Zhang9, S. Zhou7, S. J. Zhou51, and L. Zolin17 (PHENIX Collaboration)

  • 1Abilene Christian University, Abilene, Texas 79699, USA
  • 2Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
  • 3Department of Physics, Banaras Hindu University, Varanasi 221005, India
  • 4Bhabha Atomic Research Centre, Bombay 400 085, India
  • 5Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 6University of California-Riverside, Riverside, California 92521, USA
  • 7China Institute of Atomic Energy (CIAE), Beijing, People’s Republic of China
  • 8Center for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
  • 9Columbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USA
  • 10Dapnia, CEA Saclay, F-91191, Gif-sur-Yvette, France
  • 11Debrecen University, H-4010 Debrecen, Egyetem tér 1, Hungary
  • 12Florida State University, Tallahassee, Florida 32306, USA
  • 13Georgia State University, Atlanta, Georgia 30303, USA
  • 14Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
  • 15Institute for High Energy Physics (IHEP), Protvino, Russia
  • 16Iowa State University, Ames, Iowa 50011, USA
  • 17Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
  • 18KAERI, Cyclotron Application Laboratory, Seoul, South Korea
  • 19Kangnung National University, Kangnung 210-702, South Korea
  • 20KEK, High Energy Accelerator Research Organization, Tsukuba-shi, Ibaraki-ken 305-0801, Japan
  • 21KFKI Research Institute for Particle and Nuclear Physics (RMKI), H-1525 Budapest 114, POBox 49, Hungary
  • 22Korea University, Seoul, 136-701, Korea
  • 23Russian Research Center “Kurchatov Institute”, Moscow, Russia
  • 24Kyoto University, Kyoto 606-8502, Japan
  • 25Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, France
  • 26Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 27Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 28LPC, Université Blaise Pascal, CNRS-IN2P3, Clermont-Fd, 63177 Aubiere Cedex, France
  • 29Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
  • 30Institut für Kernphysik, University of Muenster, D-48149 Muenster, Germany
  • 31Myongji University, Yongin, Kyonggido 449-728, Korea
  • 32Nagasaki Institute of Applied Science, Nagasaki-shi, Nagasaki 851-0193, Japan
  • 33University of New Mexico, Albuquerque, New Mexico 87131, USA
  • 34New Mexico State University, Las Cruces, New Mexico 88003, USA
  • 35Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 36IPN-Orsay, Universite Paris Sud, CNRS-IN2P3, BP1, F-91406, Orsay, France
  • 37PNPI, Petersburg Nuclear Physics Institute, Gatchina, Russia
  • 38RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
  • 39RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 40St. Petersburg State Technical University, St. Petersburg, Russia
  • 41Universidade de São Paulo, Instituto de Física, Caixa Postal 66318, São Paulo CEP05315-970, Brazil
  • 42System Electronics Laboratory, Seoul National University, Seoul, South Korea
  • 43Chemistry Department, Stony Brook University, SUNY, Stony Brook, New York 11794-3400, USA
  • 44Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USA
  • 45SUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722 - 44307, Nantes, France
  • 46University of Tennessee, Knoxville, Tennessee 37996, USA
  • 47Department of Physics, Tokyo Institute of Technology, Tokyo, 152-8551, Japan
  • 48Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
  • 49Vanderbilt University, Nashville, Tennessee 37235, USA
  • 50Waseda University, Advanced Research Institute for Science and Engineering, 17 Kikui-cho, Shinjuku-ku, Tokyo 162-0044, Japan
  • 51Weizmann Institute, Rehovot 76100, Israel
  • 52Yonsei University, IPAP, Seoul 120-749, Korea

  • *Deceased.
  • †PHENIX Spokesperson; zajc@nevis.columbia.edu
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Phys. Rev. D 76, 092002 – Published 13 November, 2007

DOI: https://doi.org/10.1103/PhysRevD.76.092002

Abstract

Muon production at forward rapidity (1.5≤|η|≤1.8) has been measured by the PHENIX experiment over the transverse momentum range 1≤pT≤3  GeV/c in s=200  GeV p+p collisions at the Relativistic Heavy Ion Collider. After statistically subtracting contributions from light hadron decays an excess remains which is attributed to the semileptonic decays of hadrons carrying heavy flavor, i.e. charm quarks or, at high pT, bottom quarks. The resulting muon spectrum from heavy flavor decays is compared to PYTHIA and a next-to-leading-order perturbative QCD calculation. PYTHIA is used to determine the charm quark spectrum that would produce the observed muon excess. The corresponding differential cross section for charm quark production at forward rapidity is determined to be dσcc¯/dy|y=1.6=0.243±0.013(stat.)±0.105(data syst.)+0.049−0.087(PYTHIA syst.)  mb.

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Phys. Rev. D 76, 092002– Published 13 November, 2007
  • Received 18 September 2006

© 2007 American Physical Society

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