Year: 2015
Type: article
Abstract: We present measurements of electrons and positrons from the semileptonic decays of heavy-flavor hadrons at midrapidity ($|y|<$ 0.35) in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=62.4$ GeV. The data were collected in 2010 by the PHENIX experiment that included the new hadron-blind detector. The invariant yield of electrons from heavy-flavor decays is measured as a function of transverse momentum in the range $1<{p}_{T}^{e}<5$ GeV/$c$. The invariant yield per binary collision is slightly enhanced above the $p+p$ reference in $\mathrm{Au}+\mathrm{Au}$ 0%--20%, 20%--40%, and 40%--60% centralities at a comparable level. At this low beam energy this may be a result of the interplay between initial-state Cronin effects, final-state flow, and energy loss in medium. The ${v}_{2}$ of electrons from heavy-flavor decays is nonzero when averaged between $1.3<{p}_{T}^{e}<2.5$ GeV/$c$ for 0%--40% centrality collisions at $\sqrt{{s}_{NN}}=62.4$ GeV. For 20%--40% centrality collisions, the ${v}_{2}$ at $\sqrt{{s}_{NN}}=62.4$ GeV is smaller than that for heavy-flavor decays at $\sqrt{{s}_{NN}}=200$ GeV. The ${v}_{2}$ of the electrons from heavy-flavor decay at the lower beam energy is also smaller than ${v}_{2}$ for pions. Both results indicate that the heavy quarks interact with the medium formed in these collisions, but they may not be at the same level of thermalization with the medium as observed at $\sqrt{{s}_{NN}}=200$ GeV.
Source: Physical Review C
Authors: A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta'ani, J. Alexander, A. Angerami, K. Aoki, N. Apadula, Y. Aramaki, H. Asano, E. C. Aschenauer, E. T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, B. Bannier, K. N. Barish, B. Bassalleck, S. Bathe, V. Baublis, S. Baumgart, A. Bazilevsky, R. Belmont, A. Berdnikov, Y. Berdnikov, X. Bing, D. S. Blau, J. S. Bok, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, S. Butsyk, S. Campbell, P. Castera, C.-H. Chen, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, S. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, M. Connors, M. Csanád, T. Csörgő, S. Dairaku, A. Datta, M. S. Daugherity, G. David, A. Denisov, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, L. Ding, A. Dion, M. Donadelli, O. Drapier, A. Drees, K. A. Drees, J. M. Durham, A. Durum, L. D'Orazio, S. Edwards, Y. V. Efremenko, T. Engelmore, A. Enokizono, S. Esumi, K. O. Eyser, B. Fadem, D. E. Fields, M. Finger, M. Finger, F. Fleuret, S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, T. Fusayasu, K. Gainey, C. Gal, A. Garishvili, I. Garishvili, A. Glenn, X. Gong, M. Gonin, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, L. Guo, H.-Å. Gustafsson, T. Hachiya, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hanks, K. Hashimoto, E. Haslum, R. Hayano, X. He, T. K. Hemmick, T. Hester, J. C. Hill, R. S. Hollis, K. Homma, B. Hong, T. Horaguchi, Y. Hori, S. Huang, T. Ichihara, H. Iinuma, Y. Ikeda, J. Imrek, M. Inaba, A. Iordanova, D. Isenhower, M. Issah, D. Ivanishchev, B. V. Jacak, M. Javani, J. Jia, X. Jiang, B. M. Johnson, K. S. Joo, D. Jouan, D. S. Jumper, J. Kamin, S. Kaneti, B. H. Kang, J. H. Kang, J. S. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, D. Kawall, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, B. I. Kim, C. Kim, D. J. Kim, E.-J. Kim, H. J. Kim, K.-B. Kim, Y.-J. Kim, Y. K. Kim, E. Kinney, Á. Kiss, E. Kistenev, J. Klatsky, D. Kleinjan, P. Kline, Y. Komatsu, B. Komkov, J. Koster, D. Kotchetkov, D. Kotov, A. Král, F. Krizek, G. J. Kunde, K. Kurita, M. Kurosawa, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, A. Lebedev, B. Lee, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, S. H. Lee, S. R. Lee, M. J. Leitch, M. A. L. Leite, M. Leitgab, B. Lewis, S. H. Lim, L. A. Linden Levy, M. X. Liu, B. Love, C. F. Maguire, Y. I. Makdisi, M. Makek, A. Manion, V. I. Manko, E. Mannel, S. Masumoto, M. McCumber, P. L. McGaughey, D. McGlinchey, C. McKinney, M. Mendoza, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, A. Milov, D. K. Mishra, J. T. Mitchell, Y. Miyachi, S. Miyasaka, A. K. Mohanty, H. J. Moon, D. P. Morrison, S. Motschwiller, T. V. Moukhanova, T. Murakami, J. Murata, T. Nagae, S. Nagamiya, J. L. Nagle, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, C. Nattrass, A. Nederlof, M. Nihashi, R. Nouicer, N. Novitzky, A. S. Nyanin, E. O'Brien, C. A. Ogilvie, K. Okada, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, V. Pantuev, V. Papavassiliou, B. H. Park, I. H. Park, S. K. Park, S. F. Pate, L. Patel, H. Pei, J.-C. Peng, H. Pereira, D. Yu. Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Proissl, M. L. Purschke, H. Qu, J. Rak, I. Ravinovich, K. F. Read, D. Reynolds, V. Riabov, Y. Riabov, E. Richardson, N. Riveli, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, B. Sahlmueller, N. Saito, T. Sakaguchi, V. Samsonov, M. Sano, M. Sarsour, S. Sawada, K. Sedgwick, R. Seidl, A. Sen, R. Seto, D. Sharma, I. Shein, T.-A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, M. Slunečka, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, M. Soumya, I. V. Sourikova, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, A. Sukhanov, J. Sun, J. Sziklai, E. M. Takagui, A. Takahara, A. Taketani, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, E. Tennant, H. Themann, T. Todoroki, L. Tomášek, M. Tomášek, H. Torii, R. S. Towell, I. Tserruya, Y. Tsuchimoto, T. Tsuji, C. Vale, H. W. van Hecke, M. Vargyas, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, M. Virius, A. Vossen, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, Y. S. Watanabe, F. Wei, R. Wei, S. Whitaker, S. N. White, D. Winter, S. Wolin, C. L. Woody, M. Wysocki, Y. L. Yamaguchi, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, Z. You, I. Younus, I. E. Yushmanov, W. A. Zajc, A. Zelenski
Institutions: University of Colorado Boulder, Los Alamos National Laboratory, University of Michigan, Stony Brook University, Brookhaven National Laboratory, RIKEN BNL Research Center, RIKEN Nishina Center, Center for Nuclear Study, The University of Tokyo, The University of Tokyo, New Mexico State University, Columbia University, Kyoto University, Oak Ridge National Laboratory, Institute for High Energy Physics, University of California, Riverside, University of New Mexico, Baruch College, City University of New York, Petersburg Nuclear Physics Institute, Vanderbilt University, Peter the Great St. Petersburg Polytechnic University, Ohio University, Kurchatov Institute, Yonsei University, University of Illinois Urbana-Champaign, Jeonbuk National University, Seoul National University, Bhabha Atomic Research Centre, Lund University, University of Tsukuba, Eötvös Loránd University, Institute for Particle and Nuclear Physics, HUN-REN Wigner Research Centre for Physics, Hungarian Academy of Sciences, University of Massachusetts Amherst, Abilene Christian University, Universidade de São Paulo, Iowa State University, Centre National de la Recherche Scientifique, École Polytechnique, Institut National de Physique Nucléaire et de Physique des Particules, Laboratoire Leprince-Ringuet, University of Maryland, College Park, Muhlenberg College, Charles University, Florida State University, Nagasaki Institute of Applied Science, University of Tennessee at Knoxville, Lawrence Livermore National Laboratory, Augustana University, Ewha Womans University, Rikkyo University, Georgia State University, Hiroshima University, Korea University, High Energy Accelerator Research Organization, University of Debrecen, Myongji University, Université Paris-Sud, Hanyang University, Helsinki Institute of Physics, University of Jyväskylä, Czech Technical University in Prague, University of Zagreb, Weizmann Institute of Science, Tokyo Institute of Technology, Institute for Nuclear Research, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay, National Research Nuclear University MEPhI, Université Blaise Pascal, Banaras Hindu University, FZU - Institute of Physics of the Czech Academy of Sciences, Lahore University of Management Sciences
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, CRDF Global, Alexander von Humboldt-Stiftung, United States - Israel Binational Science Foundation, Vanderbilt University, State University of New York, Lahore University of Management Sciences, Abilene Christian University, Hungarian-American Enterprise Scholarship Fund, National Research Foundation, Department of Science and Technology, Ministry of Science and Technology, India, Department of Atomic Energy, Government of India, Ministry of Education, Culture, Sports, Science and Technology, Fundação de Amparo à Pesquisa do Estado de São Paulo, National Natural Science Foundation of China, Ministerstvo Školství, Mládeže a Tělovýchovy, Bundesministerium für Bildung und Forschung, Ministry of Education and Science of the Russian Federation, Hungarian Scientific Research Fund, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Ministry of Science, ICT and Future Planning, National Research Foundation of Korea, Israel Science Foundation, Hrvatska Zaklada za Znanost, Centre National de la Recherche Scientifique, Office of Science, German Academic Exchange Service New Delhi, Japan Society for the Promotion of Science, Russian Academy of Sciences, Institut National de Physique Nucléaire et de Physique des Particules, Nuclear Physics, Brookhaven National Laboratory
Awards: Challenge to experimental detection of the most intense magnetic field in the universe utilyzing non-central nucleus-nucleus collisions and to non-linear quantum electrodynamics, G5548152103, Second step to reveal deconfined quark behavior in nucleus-nucleus collisions at ultimate energies: selective measurement of hard scattering phenomena
OpenAlex ID: W2010192212