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Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au+Au Collisions at sqrt(s_NN) = 200 GeV

S.S. Adler S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba J. Alexander R. Amirikas Laurent Aphecetche 1 S.H. Aronson R. Averbeck T.C. Awes R. Azmoun V. Babintsev A. Baldisseri K.N. Barish P.D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J.G. Boissevain H. Borel S. Borenstein M.L. Brooks D.S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W.C. Chang S. Chernichenko C.Y. Chi J. Chiba M. Chiu I.J. Choi J. Choi R.K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B.A. Cole P. Constantin D.G. d'Enterria G. David H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond O. Dietzsch O. Drapier 2 A. Drees R. Du Rietz A. Durum D. Dutta Y.V. Efremenko K. El Chenawi A. Enokizono H. Enyo S. Esumi L. Ewell D.E. Fields F. Fleuret 2 S.L. Fokin B.D. Fox Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley S.-Y. Fung S. Garpman T.K. Ghosh A. Glenn G. Gogiberidze M. Gonin 2 J. Gosset Y. Goto R. Granier de Cassagnac 2 N. Grau S.V. Greene M. Grosse Perdekamp W. Guryn H.-A. Gustafsson T. Hachiya J.S. Haggerty H. Hamagaki A.G. Hansen E.P. Hartouni M. Harvey R. Hayano X. He M. Heffner T.K. Hemmick J.M. Heuser M. Hibino J.C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V.V. Ikonnikov K. Imai D. Isenhower M. Ishihara M. Issah A. Isupov B.V. Jacak W.Y. Jang Y. Jeong J. Jia O. Jinnouchi B.M. Johnson S.C. Johnson K.S. Joo D. Jouan 3 S. Kametani N. Kamihara J.H. Kang S.S. Kapoor K. Katou Steven Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D.H. Kim D.J. Kim D.W. Kim E. Kim G.-B. Kim 2 H.J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov D. Koehler T. Kohama M. Kopytine D. Kotchetkov A. Kozlov P.J. Kroon C.H. Kuberg K. Kurita Y. Kuroki M.J. Kweon Y. Kwon G.S. Kyle R. Lacey V. Ladygin J.G. Lajoie A. Lebedev S. Leckey D.M. Lee S. Lee M.J. Leitch X.H. Li H. Lim A. Litvinenko M.X. Liu Yehan Liu C.F. Maguire Y.I. Makdisi A. Malakhov V.I. Manko Y. Mao Gines Martinez Garcia 1 M.D. Marx H. Masui F. Matathias T. Matsumoto P.L. Mcgaughey E. Melnikov F. Messer Y. Miake J. Milan T.E. Miller A. Milov S. Mioduszewski R.E. Mischke G.C. Mishra J.T. Mitchell A.K. Mohanty D.P. Morrison J.M. Moss F. Muhlbacher D. Mukhopadhyay M. Muniruzzaman J. Murata S. Nagamiya J.L. Nagle T. Nakamura B.K. Nandi M. Nara J. Newby P. Nilsson A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha K. Okada M. Ono V. Onuchin A. Oskarsson I. Otterlund K. Oyama K. Ozawa D. Pal A.P.T. Palounek V.S. Pantuev V. Papavassiliou J. Park A. Parmar S.F. Pate T. Peitzmann J.-C. Peng V. Peresedov C. Pinkenburg R.P. Pisani F. Plasil M.L. Purschke A.K. Purwar J. Rak I. Ravinovich K.F. Read M. Reuter K. Reygers V. Riabov Y. Riabov G. Roche 4 A. Romana 2 M. Rosati P. Rosnet 4 S.S. Ryu M.E. Sadler N. Saito T. Sakaguchi M. Sakai S. Sakai V. Samsonov L. Sanfratello R. Santo H.D. Sato S. Sato S. Sawada Y. Schutz V. Semenov R. Seto M.R. Shaw T.K. Shea T.-A. Shibata K. Shigaki T. Shiina C.L. Silva D. Silvermyr K.S. Sim C.P. Singh V. Singh M. Sivertz 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 J.P. Sullivan E.M. Takagui A. Taketani M. Tamai K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum P. Tarjan J.D. Tepe T.L. Thomas J. Tojo H. Torii R.S. Towell I. Tserruya H. Tsuruoka S.K. Tuli H. Tydesjo N. Tyurin H.W. van Hecke J. Velkovska M. Velkovsky L. Villatte A.A. Vinogradov M.A. Volkov E. Vznuzdaev X.R. Wang Y. Watanabe S.N. White F.K. Wohn C.L. Woody W. Xie Y. Yang A. Yanovich S. Yokkaichi G.R. Young I.E. Yushmanov W.A. Zajc C. Zhang S. Zhou S.J. Zhou L. Zolin
Abstract : The PHENIX experiment has measured mid-rapidity transverse momentum spectra (0.4 < p_T < 4.0 GeV/c) of single electrons as a function of centrality in Au+Au collisions at sqrt(s_NN) = 200 GeV. Contributions to the raw spectra from photon conversions and Dalitz decays of light neutral mesons are measured by introducing a thin (1.7% X_0) converter into the PHENIX acceptance and are statistically removed. The subtracted ``non-photonic'' electron spectra are primarily due to the semi-leptonic decays of hadrons containing heavy quarks (charm and bottom). For all centralities, charm production is found to scale with the nuclear overlap function, T_AA. For minimum-bias collisions the charm cross section per binary collision is N_cc^bar/T_AA = 622 +/- 57 (stat.) +/- 160 (sys.) microbarns.
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Submitted on : Tuesday, January 11, 2005 - 12:25:46 PM
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S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Centrality Dependence of Charm Production from a Measurement of Single Electrons in Au+Au Collisions at sqrt(s_NN) = 200 GeV. Physical Review Letters, American Physical Society, 2005, 94, pp.082301-6. ⟨10.1103/PhysRevLett.94.082301⟩. ⟨in2p3-00023548⟩

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