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Heavy-flavor electron-muon correlations in p plus p and d plus Au collisions at root s(NN)=200 GeV

Adare, A.; Afanasiev, S.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Al-Bataineh, H.; Alexander, J.; Angerami, A.; Aoki, K. and Apadula, N., et al. (2014) In Physical Review C (Nuclear Physics) 89(3).
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 c (c) over bar, in root s(NN) = 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... (More)
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 c (c) over bar, in root s(NN) = 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-mu 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 sigma(c (c) over bar) = 538 +/- 46 (stat) +/- 197 (data syst) +/- 174 (model syst) mu b. These generators also indicate that the back-to-back peak at Delta phi = pi is dominantly from the leading-order contributions (gluon fusion), while higher-order processes (flavor excitation and gluon splitting) contribute to the yield at all Delta phi. We observe a suppression in the pair yield per collision in d + Au. We find the pair yield suppression factor for 2.7 < Delta phi < 3.2 rad is J(dA) = 0.433 +/- 0.087 (stat) +/- 0.135 (syst). Conclusions: The e-mu pairs result from partons at x(Au) similar to 10(-2) at Q(2) = 10 GeV/c(2) at the edge of the shadowing region. The pair suppression indicates modification to c (c) over bar pairs for these kinematics in the cold nuclear medium at RHIC. (Less)
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Physical Review C (Nuclear Physics)
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89
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3
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American Physical Society
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  • scopus:84898810279
ISSN
0556-2813
DOI
10.1103/PhysRevC.89.034915
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English
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@article{b3c190f6-2969-4d80-a546-599ca6ef5198,
  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 c (c) over bar, in root s(NN) = 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-mu 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 sigma(c (c) over bar) = 538 +/- 46 (stat) +/- 197 (data syst) +/- 174 (model syst) mu b. These generators also indicate that the back-to-back peak at Delta phi = pi is dominantly from the leading-order contributions (gluon fusion), while higher-order processes (flavor excitation and gluon splitting) contribute to the yield at all Delta phi. We observe a suppression in the pair yield per collision in d + Au. We find the pair yield suppression factor for 2.7 &lt; Delta phi &lt; 3.2 rad is J(dA) = 0.433 +/- 0.087 (stat) +/- 0.135 (syst). Conclusions: The e-mu pairs result from partons at x(Au) similar to 10(-2) at Q(2) = 10 GeV/c(2) at the edge of the shadowing region. The pair suppression indicates modification to c (c) over bar pairs for these kinematics in the cold nuclear medium at RHIC.},
  articleno    = {034915},
  author       = {Adare, A. and Afanasiev, S. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Al-Bataineh, H. and Alexander, J. and Angerami, A. and Aoki, K. and Apadula, N. and Aphecetche, L. and Aramaki, Y. and Asai, J. and Atomssa, E. T. and Averbeck, R. and Awes, T. C. and Azmoun, B. and Babintsev, V. and Bai, M. and Baksay, G. and Baksay, L. and Baldisseri, A. and Barish, K. N. and Barnes, P. D. and Bassalleck, B. and Basye, A. T. and Bathe, S. and Batsouli, S. and Baublis, V. and Baumann, C. and Bazilevsky, A. and Belikov, S. and Belmont, R. and Bennett, R. and Berdnikov, A. and Berdnikov, Y. and Bhom, J. H. and Bickley, A. A. and Blau, D. S. and Boissevain, J. G. and Bok, J. S. and Borel, H. and Boyle, K. and Brooks, M. L. and Buesching, H. and Bumazhnov, V. and Bunce, G. and Butsyk, S. and Camacho, C. M. and Campbell, S. and Caringi, A. and Chang, B. S. and Chang, W. C. and Charvet, J. -L. and Chen, C. -H. and Chernichenko, S. and Chi, C. Y. and Chiu, M. and Choi, I. J. and Choi, J. B. and Choudhury, R. K. and Christiansen, Peter and Chujo, T. and Chung, P. and Churyn, A. and Chvala, O. and Cianciolo, V. and Citron, Z. and Cole, B. A. and del Valle, Z. Conesa and Connors, M. and Constantin, P. and Csanad, M. and Csoergo, T. and Dahms, T. and Dairaku, S. and Danchev, I. and Das, K. and Datta, A. and David, G. and Dayananda, M. K. and Denisov, A. and d'Enterria, D. and Deshpande, A. and Desmond, E. J. and Dharmawardane, K. V. and Dietzsch, O. and Dion, A. and Donadelli, M. and Drapier, O. and Drees, A. and Drees, K. A. and Dubey, A. K. and Durham, J. M. and Durum, A. and Dutta, D. and Dzhordzhadze, V. and D'Orazio, L. and Edwards, S. and Efremenko, Y. V. and Ellinghaus, F. and Engelmore, T. and Enokizono, A. and En'yo, H. and Esumi, S. and Eyser, K. O. and Fadem, B. and Fields, D. E. and Finger, M. and Finger Jr., M. and Fleuret, F. and Fokin, S. L. and Fraenkel, Z. and Frantz, J. E. and Franz, A. and Frawley, A. D. and Fujiwara, K. and Fukao, Y. and Fusayasu, T. and Garishvili, I. and Glenn, A. and Gong, H. and Gonin, M. and Gosset, J. and Goto, Y. and de Cassagnac, R. Granier and Grau, N. and Greene, S. V. and Grim, G. and Perdekamp, M. Grosse and Gunji, T. and Gustafsson, Hans-Åke and Henni, A. Hadj and Haggerty, J. S. and Hahn, K. I. and Hamagaki, H. and Hamblen, J. and Han, R. and Hanks, J. and Hartouni, E. P. and Haruna, K. and Haslum, Eva and Hayano, R. and He, X. and Heffner, M. and Hemmick, T. K. and Hester, T. and Hill, J. C. and Hohlmann, M. and Holzmann, W. and Homma, K. and Hong, B. and Horaguchi, T. and Hornback, D. and Huang, S. and Ichihara, T. and Ichimiya, R. and Iinuma, H. and Ikeda, Y. and Imai, K. and Imrek, J. and Inaba, M. and Isenhower, D. and Ishihara, M. and Isobe, T. and Issah, M. and Isupov, A. and Ivanischev, D. and Iwanaga, Y. and Jacak, B. V. and Jia, J. and Jiang, X. and Jin, J. and Johnson, B. M. and Jones, T. and Joo, K. S. and Jouan, D. and Jumper, D. S. and Kajihara, F. and Kametani, S. and Kamihara, N. and Kamin, J. and Kang, J. H. and Kapustinsky, J. and Karatsu, K. and Kasai, M. and Kawall, D. and Kawashima, M. and Kazantsev, A. V. and Kempel, T. and Khanzadeev, A. and Kijima, K. M. and Kikuchi, J. and Kim, A. and Kim, B. I. and Kim, D. H. and Kim, D. J. and Kim, E. and Kim, E. -J. and Kim, S. H. and Kim, Y. -J. and Kinney, E. and Kiriluk, K. and Kiss, A. and Kistenev, E. and Klay, J. and Klein-Boesing, C. and Kleinjan, D. and Kochenda, L. and Komkov, B. and Konno, M. and Koster, J. and Kozlov, A. and Kral, A. and Kravitz, A. and Kunde, G. J. and Kurita, K. and Kurosawa, M. and Kweon, M. J. and Kwon, Y. and Kyle, G. S. and Lacey, R. and Lai, Y. S. and Lajoie, J. G. and Layton, D. and Lebedev, A. and Lee, D. M. and Lee, J. and Lee, K. B. and Lee, K. S. and Lee, T. and Leitch, M. J. and Leite, M. A. L. and Lenzi, B. and Li, X. and Lichtenwalner, P. and Liebing, P. and Levy, L. A. Linden and Liska, T. and Litvinenko, A. and Liu, H. and Liu, M. X. and Love, B. and Lynch, D. and Maguire, C. F. and Makdisi, Y. I. and Malakhov, A. and Malik, M. D. and Manko, V. I. and Mannel, E. and Mao, Y. and Masek, L. and Masui, H. and Matathias, F. and McCumber, M. and McGaughey, P. L. and McGlinchey, D. and Means, N. and Meredith, B. and Miake, Y. and Mibe, T. and Mignerey, A. C. and Mikes, P. and Miki, K. and Milov, A. and Mishra, M. and Mitchell, J. T. and Mohanty, A. K. and Moon, H. J. and Morino, Y. and Morreale, A. and Morrison, D. P. and Moukhanova, T. V. and Mukhopadhyay, D. and Murakami, T. and Murata, J. and Nagamiya, S. and Nagle, J. L. and Naglis, M. and Nagy, M. I. and Nakagawa, I. and Nakamiya, Y. and Nakamura, K. R. and Nakamura, T. and Nakano, K. and Nam, S. and Newby, J. and Nguyen, M. and Nihashi, M. and Niida, T. and Nouicer, R. and Nyanin, A. S. and Oakley, C. and O'Brien, E. and Oda, S. X. and Ogilvie, C. A. and Oka, M. and Okada, K. and Onuki, Y. and Oskarsson, Anders and Ouchida, M. and Ozawa, K. and Pak, R. and Palounek, A. P. T. and Pantuev, V. and Papavassiliou, V. and Park, I. H. and Park, J. and Park, S. K. and Park, W. J. and Pate, S. F. and Pei, H. and Peng, J. -C. and Pereira, H. and Peresedov, V. and Peressounko, D. Yu. and Petti, R. and Pinkenburg, C. and Pisani, R. P. and Proissl, M. and Purschke, M. L. and Purwar, A. K. and Qu, H. and Rak, J. and Rakotozafindrabe, A. and Ravinovich, I. and Read, K. F. and Rembeczki, S. and Reygers, K. and Riabov, V. and Riabov, Y. and Richardson, E. and Roach, D. and Roche, G. and Rolnick, S. D. and Rosati, M. and Rosen, C. A. and Rosendahl, Sarah and Rosnet, P. and Rukoyatkin, P. and Ruzicka, P. and Rykov, V. L. and Sahlmueller, B. and Saito, N. and Sakaguchi, T. and Sakai, S. and Sakashita, K. and Samsonov, V. and Sano, S. and Sato, T. and Sawada, S. and Sedgwick, K. and Seele, J. and Seidl, R. and Semenov, A. Yu. and Semenov, V. and Seto, R. and Sharma, D. and Shein, I. and Shibata, T. -A. and Shigaki, K. and Shimomura, M. and Shoji, K. and Shukla, P. and Sickles, A. and Silva, C. L. and Silvermyr, D. and Silvestre, C. and Sim, K. S. and Singh, B. K. and Singh, C. P. and Singh, V. and Slunecka, M. and Soldatov, A. and Soltz, R. A. and Sondheim, W. E. and Sorensen, S. P. and Sourikova, I. V. and Staley, F. and Stankus, P. W. and Stenlund, Evert and Stepanov, M. and Ster, A. and Stoll, S. P. and Sugitate, T. and Suire, C. and Sukhanov, A. and Sziklai, J. and Takagui, E. M. and Taketani, A. and Tanabe, R. and Tanaka, Y. and Taneja, S. and Tanida, K. and Tannenbaum, M. J. and Tarafdar, S. and Taranenko, A. and Tarjan, P. and Themann, H. and Thomas, D. and Thomas, T. L. and Togawa, M. and Toia, A. and Tomasek, L. and Tomita, Y. and Torii, H. and Towell, R. S. and Tram, V. -N. and Tserruya, I. and Tsuchimoto, Y. and Vale, C. and Valle, H. and van Hecke, H. W. and Vazquez-Zambrano, E. and Veicht, A. and Velkovska, J. and Vertesi, R. and Vinogradov, A. A. and Virius, M. and Vrba, V. and Vznuzdaev, E. and Wang, X. R. and Watanabe, D. and Watanabe, K. and Watanabe, Y. and Wei, F. and Wei, R. and Wessels, J. and White, S. N. and Winter, D. and Woody, C. L. and Wright, R. M. and Wysocki, M. and Xie, W. and Yamaguchi, Y. L. and Yamaura, K. and Yang, R. and Yanovich, A. and Ying, J. and Yokkaichi, S. and You, Z. and Young, G. R. and Younus, I. and Yushmanov, I. E. and Zajc, W. A. and Zaudtke, O. and Zhang, C. and Zhou, S. and Zolin, L.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {3},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Heavy-flavor electron-muon correlations in p plus p and d plus Au collisions at root s(NN)=200 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevC.89.034915},
  volume       = {89},
  year         = {2014},
}