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Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss 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 2 M.L. Brooks D.S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk X. Camard 1 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. d'Enterria 1 G. David H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond A. Devismes O. Dietzsch O. Drapier 2 A. Drees R. Du Rietz A. Durum D. Dutta Y.V. Efremenko J. Egdemir K. El Chenawi A. Enokizono H. En'Yo 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 N. Hayashi 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. 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 1 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. Tydesjö N. Tyurin H.W. van Hecke J. Velkovska M. Velkovsky V. Veszprémi 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 < 5.0 GeV/c) of electrons as a function of centrality in Au+Au collisions at sqrt(s_NN)=200 GeV. Contributions from photon conversions and from light hadron decays, mainly Dalitz decays of pi^0 and eta mesons, were removed. The resulting non-photonic electron spectra are primarily due to the semi-leptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to non-photonic electrons in p+p collisions. A significant suppression of electrons at high p_T is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.
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Submitted on : Friday, January 13, 2006 - 11:28:24 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:18 PM

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S. S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au+Au Collisions at $\sqrt{s_{NN}}$=200 GeV. Physical Review Letters, American Physical Society, 2006, 96, pp.032301. ⟨10.1103/PhysRevLett.96.032301⟩. ⟨in2p3-00025384⟩

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