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Heavy-flavor electron-muon correlations in p+p and d+Au collisions at sNN =200 GeV

  • A. Adare*
  • , S. Afanasiev
  • , C. Aidala
  • , N. N. Ajitanand
  • , Y. Akiba
  • , H. Al-Bataineh
  • , J. Alexander
  • , A. Angerami
  • , K. Aoki
  • , N. Apadula
  • , L. Aphecetche
  • , Y. Aramaki
  • , J. Asai
  • , E. T. Atomssa
  • , R. Averbeck
  • , T. C. Awes
  • , B. Azmoun
  • , V. Babintsev
  • , M. Bai
  • , G. Baksay
  • L. Baksay, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, A. T. Basye, S. Bathe, S. Batsouli, V. Baublis, C. Baumann, A. Bazilevsky, S. Belikov, R. Belmont, R. Bennett, A. Berdnikov, Y. Berdnikov, J. H. Bhom, A. A. Bickley, D. S. Blau, J. G. Boissevain, J. S. Bok, H. Borel, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, C. M. Camacho, S. Campbell, A. Caringi, B. S. Chang, W. C. Chang, J. L. Charvet, C. H. Chen, S. Chernichenko, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, P. Chung, A. Churyn, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa Del Valle, M. Connors, P. Constantin, M. Csanád, T. Csörgo, T. Dahms, S. Dairaku, I. Danchev, K. Das, A. Datta, G. David, M. K. Dayananda, A. Denisov, D. D'Enterria, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, A. Dion, M. Donadelli, O. Drapier, A. Drees, K. A. Drees, A. K. Dubey, J. M. Durham, A. Durum, D. Dutta, V. Dzhordzhadze, L. D'Orazio, S. Edwards, Y. V. Efremenko, F. Ellinghaus, T. Engelmore, A. Enokizono, H. En'Yo, S. Esumi, K. O. Eyser, B. Fadem, D. E. Fields, M. Finger, M. Finger, F. Fleuret, S. L. Fokin, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, I. Garishvili, A. Glenn, H. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier De Cassagnac, N. Grau, S. V. Greene, G. Grim, M. Grosse Perdekamp, T. Gunji, H. Å Gustafsson, A. Hadj Henni, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hamblen, R. Han, J. Hanks, E. P. Hartouni, K. Haruna, E. Haslum, R. Hayano, X. He, M. Heffner, T. K. Hemmick, T. Hester, J. C. Hill, M. Hohlmann, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, H. Iinuma, Y. Ikeda, K. Imai, J. Imrek, M. Inaba, D. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, D. Ivanischev, Y. Iwanaga, B. V. Jacak, J. Jia, X. Jiang, J. Jin, B. M. Johnson, T. Jones, K. S. Joo, D. Jouan, D. S. Jumper, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, J. H. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, D. Kawall, M. Kawashima, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, J. Kikuchi, A. Kim, B. I. Kim, D. H. Kim, D. J. Kim, E. Kim, E. J. Kim, S. H. Kim, Y. J. Kim, E. Kinney, K. Kiriluk, Á Kiss, E. Kistenev, J. Klay, C. Klein-Boesing, D. Kleinjan, L. Kochenda, B. Komkov, M. Konno, J. Koster, A. Kozlov, A. Král, A. Kravitz, G. J. Kunde, K. Kurita, M. Kurosawa, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, D. Layton, A. Lebedev, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, T. Lee, M. J. Leitch, M. A.L. Leite, B. Lenzi, X. Li, P. Lichtenwalner, P. Liebing, L. A.Linden Levy, T. Liška, A. Litvinenko, H. Liu, M. X. Liu, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Malakhov, M. D. Malik, V. I. Manko, E. Mannel, Y. Mao, L. Mašek, H. Masui, F. Matathias, M. McCumber, P. L. McGaughey, D. McGlinchey, N. Means, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, P. Mikeš, K. Miki, A. Milov, M. Mishra, J. T. Mitchell, A. K. Mohanty, H. J. Moon, Y. Morino, A. Morreale, D. P. Morrison, T. V. Moukhanova, D. Mukhopadhyay, T. Murakami, J. Murata, S. Nagamiya, J. L. Nagle, M. Naglis, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, S. Nam, J. Newby, M. Nguyen, M. Nihashi, T. Niida, R. Nouicer, A. S. Nyanin, C. Oakley, E. O'Brien, S. X. Oda, C. A. Ogilvie, M. Oka, K. Okada, Y. Onuki, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, A. P.T. Palounek, V. Pantuev, V. Papavassiliou, I. H. Park, J. Park, S. K. Park, W. J. Park, S. F. Pate, H. Pei, J. C. Peng, H. Pereira, V. Peresedov, D. Yu Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Proissl, M. L. Purschke, A. K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe, I. Ravinovich, K. F. Read, S. Rembeczki, K. Reygers, V. Riabov, Y. Riabov, E. Richardson, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, C. A. Rosen, S. S.E. Rosendahl, P. Rosnet, P. Rukoyatkin, P. RuŽička, V. L. Rykov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, V. Samsonov, S. Sano, T. Sato, S. Sawada, K. Sedgwick, J. Seele, R. Seidl, A. Yu Semenov, V. Semenov, R. Seto, D. Sharma, I. Shein, T. A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, M. Slunečka, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, C. Suire, A. Sukhanov, J. Sziklai, E. M. Takagui, A. Taketani, R. Tanabe, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, P. Tarján, H. Themann, D. Thomas, T. L. Thomas, M. Togawa, A. Toia, L. Tomášek, Y. Tomita, H. Torii, R. S. Towell, V. N. Tram, I. Tserruya, Y. Tsuchimoto, C. Vale, H. Valle, H. W. Van Hecke, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, A. A. Vinogradov, M. Virius, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, F. Wei, R. Wei, J. Wessels, S. N. White, D. Winter, C. L. Woody, R. M. Wright, M. Wysocki, W. Xie, Y. L. Yamaguchi, K. Yamaura, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, Z. You, G. R. Young, I. Younus, I. E. Yushmanov, W. A. Zajc, O. Zaudtke, C. Zhang, S. Zhou, L. Zolin
*Corresponding author for this work
  • University of Colorado Boulder
  • Joint Institute for Nuclear Research
  • University of Massachusetts
  • University of Michigan, Ann Arbor
  • Stony Brook University
  • RIKEN
  • Riken BNL Research Center
  • New Mexico State University
  • Columbia University
  • Kyoto University
  • Nantes Université
  • The University of Tokyo
  • Laboratoire Leprince-Ringuet
  • Oak Ridge National Laboratory
  • Brookhaven National Laboratory
  • NRC Kurchatov Institute IHEP
  • Florida Institute of Technology
  • CEA Saclay
  • University of California at Riverside
  • Los Alamos National Laboratory
  • University of New Mexico
  • Abilene Christian University
  • City University of New York
  • Petersburg Nuclear Physics Institute (PNPI)
  • University of Münster
  • Vanderbilt University
  • Peter the Great St. Petersburg Polytechnic University
  • Yonsei University
  • Russian Research Centre Kurchatov Institute
  • Muhlenberg College
  • Academia Sinica - Institute of Physics
  • University of Illinois at Urbana-Champaign
  • Jeonbuk National University
  • Homi Bhabha National Institute
  • Lund University
  • University of Tsukuba
  • Eötvös Loránd University
  • Hungarian Academy of Sciences
  • Florida State University
  • Georgia State University
  • Universidade de São Paulo
  • Iowa State University
  • Weizmann Institute of Science
  • University of Maryland, College Park
  • Lawrence Livermore National Laboratory
  • Charles University
  • Ohio University
  • Nagasaki Institute of Applied Science
  • University of Tennessee
  • Augustana College, Sioux Falls
  • Ewha Womans University
  • Peking University
  • Hiroshima University
  • Korea University
  • Institute of Science Tokyo
  • Japan Atomic Energy Agency
  • University of Debrecen
  • Myongji University
  • Université Paris-Saclay
  • Rikkyo University
  • Waseda University
  • University of Jyväskylä
  • Seoul National University
  • Czech Technical University in Prague
  • China National Nuclear Corporation
  • Czech Academy of Sciences
  • High Energy Accelerator Research Organization, Tsukuba
  • Banaras Hindu University
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Université Blaise Pascal
  • Lahore University of Management Sciences

Research output: Contribution to journalJournal articlepeer-review

Abstract

Background: Heavy-flavor modification in relativistic p(d)+A collisions are sensitive to different kinds of strong-interaction physics ranging from modifications of the nuclear wave function to initial- and final-state energy loss. Modifications to single heavy-flavor particles and their decay leptons at midrapidity and forward rapidity are well established at the Relativistic Heavy Ion Collider (RHIC). Purpose: This paper presents measurements of azimuthal correlations of electron-muon pairs produced from heavy-flavor decays, primarily cc̄, in sNN=200 GeV p+p and d+Au collision using the PHENIX detector at RHIC. The electrons are measured at midrapidity while the muons in the pair are measured at forward rapidity, defined as the direction of the deuteron beam, in order to utilize the deuteron to probe low-x partons in the gold nucleus. Methods: This analysis uses the central spectrometer arms for electron identification and forward spectrometer arms for muon identification. Azimuthal correlations are built in all sign combinations for e-μ pairs. Subtracting the like-sign yield from the unlike-sign yield removes the correlations from light flavor decays and conversions. Results: Comparing the p+p results with several different Monte Carlo event generators, we find the results are consistent with a total charm cross section σcc̄=538±46 (stat) ± 197 (data syst) ± 174 (model syst) μb. These generators also indicate that the back-to-back peak at Δφ=π is dominantly from the leading-order contributions (gluon fusion), while higher-order processes (flavor excitation and gluon splitting) contribute to the yield at all Δφ. We observe a suppression in the pair yield per collision in d+Au. We find the pair yield suppression factor for 2.7<Δφ<3.2 rad is JdA=0.433±0.087 (stat) ± 0.135 (syst). Conclusions: The e-μ pairs result from partons at xAu∼10-2 at Q2=10 GeV/c2 at the edge of the shadowing region. The pair suppression indicates modification to cc̄ pairs for these kinematics in the cold nuclear medium at RHIC.

Original languageEnglish
Article number034915
JournalPhysical Review C - Nuclear Physics
Volume89
Issue number3
DOIs
StatePublished - 2014.03.31

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