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Medium effects on high $\P_{T}$ particle production measured with the PHENIX experiment

S.S. Adler S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba A. Al-Jamel J. Alexander G. Alley R. Amirikas K. Aoki Laurent Aphecetche 1 J.B. Archuleta J.R. Archuleta R. Armendariz V. Armijo 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 F. Bauer A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula M.T. Bjorndal M. Bobrek J.G. Boissevain S. Boose H. Borel S. Borenstein C.L. Britton Jr. M.L. Brooks D.S. Brown N. Brun 2 N. Bruner W.L. Bryan D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk M.M. Cafferty X. Camard 1 J.-S. Chai P. Chand W.C. Chang R.B. Chappell S. Chernichenko A. Chevel C.Y. Chi J. Chiba M. Chiu I.J. Choi J. Choi S. Chollet 3 R.K. Choudhury T. Chujo V. Cianciolo D. Clark Y. Cobigo B.A. Cole M.P. Comets 4 P. Constantin M. Csanad T. Csorgo H. Cunitz Jean-Pierre Cussonneau 1 D.G. d'Enterria 1 K. Das G. David F. Deak A. Debraine 3 H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond A. Devismes O. Dietzsch J.L. Drachenberg O. Drapier 3 A. Drees K.A. Drees R. Durietz A. Durum D. Dutta V. Dzhordzhadze M.A. Echave Y.V. Efremenko K. Elchenawi M.S. Emery A. Enokizono H. Enyo M.N. Ericson B. Espagnon 4 S. Esumi V. Evseev L. Ewell D.E. Fields C. Finck 1 F. Fleuret 3 S.L. Fokin B.D. Fox Z. Fraenkel S.S. Frank J.E. Frantz A. Franz A.D. Frawley J. Fried Y. Fukao S.-Y. Fung S. Gadrat 2 J. Gannon S. Garpman F. Gastaldi 3 T.F. Gee Marie Germain 1 T.K. Ghosh P. Giannotti A. Glenn G. Gogiberidze M. Gonin 3 J. Gosset Y. Goto R. Granier de Cassagnac 3 N. Grau S.V. Greene M. Grosse Perdekamp W. Guryn H.-A. Gustafsson T. Hachiya J.S. Haggerty S.F. Hahn H. Hamagaki A.G. Hansen J. Harder G.W. Hart E.P. Hartouni M. Harvey K. Hasuko R. Hayano N. Hayashi X. He M. Heffner N. Heine T.K. Hemmick J.M. Heuser M. Hibino J.S. Hicks P. Hidas H. Hiejima J.C. Hill R. Hobbs W. Holzmann K. Homma B. Hong A. Hoover T. Horaguchi J.R. Hutchins R. Hutter T. Ichihara V.V. Ikonnikov K. Imai M. Inaba M. Inuzuka D. Isenhower L. Isenhower M. Ishihara M. Issah A. Isupov B.V. Jacak U. Jagadish W.Y. Jang Y. Jeong J. Jia O. Jinnouchi B.M. Johnson S.C. Johnson J.P. Jones Jr. K.S. Joo D. Jouan 4 S. Kahn F. Kajihara S. Kametani N. Kamihara A. Kandasamy M. Kaneta J.H. Kang M. Kann S.S. Kapoor K.V. Karadjev A. Karar 3 S. Kato K. Katou T. Kawabata A. Kazantsev M.A. Kelley Steven Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D.H. Kim D.J. Kim D.W. Kim E. Kim G.-B. Kim H.J. Kim E. Kinney A. Kiss E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov D. Koehler T. Kohama R. Kohara B. Komkov M. Konno M. Kopytine D. Kotchetkov A. Kozlov V. Kozlov P. Kravtsov P.J. Kroon C.H. Kuberg G.J. Kunde V. Kuriatkov K. Kurita Y. Kuroki M.J. Kweon Y. Kwon G.S. Kyle R. Lacey V. Ladygin J.G. Lajoie Y. Le Bornec 4 A. Lebedev V.A. Lebedev S. Leckey D.M. Lee S. Lee M.J. Leitch M.A.L. Leite X.H. Li H. Lim A. Litvinenko M.X. Liu Yehan Liu J.D. Lopez C.F. Maguire Y.I. Makdisi A. Malakhov V.I. Manko Y. Mao L.J. Marek Gines Martinez Garcia 1 M.D. Marx H. Masui F. Matathias T. Matsumoto M.C. Mccain P.L. Mcgaughey R. Mckay E. Melnikov F. Messer Y. Miake N. Miftakhov J. Milan T.E. Miller A. Milov S. Mioduszewski R.E. Mischke G.C. Mishra J.T. Mitchell A.K. Mohanty B.C. Montoya J.A. Moore D.P. Morrison J.M. Moss F. Muehlbacher D. Mukhopadhyay M. Muniruzzaman J. Murata S. Nagamiya J.L. Nagle T. Nakamura B.K. Nandi M. Nara J. Newby S.A. Nikolaev P. Nilsson A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha H. Okada K. Okada M. Ono V. Onuchin A. Oskarsson I. Otterlund K. Oyama K. Ozawa D. Pal A.P.T. Palounek C. Pancake V.S. Pantuev V. Papavassiliou J. Park W.J. Park A. Parmar S.F. Pate C. Pearson H. Pei T. Peitzmann V. Penev J.-C. Peng H. Pereira V. Peresedov A. Pierson C. Pinkenburg R.P. Pisani F. Plasil R. Prigl G. Puill M.L. Purschke A.K. Purwar J.M. Qualls J. Rak S. Rankowitz I. Ravinovich K.F. Read M. Reuter K. Reygers V. Riabov Y. Riabov S.H. Robinson G. Roche 2 A. Romana 3 M. Rosati E. Roschin S.S.E. Rosendahl P. Rosnet 2 R. Ruggiero M. Rumpf V.L. Rykov 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 I. Shein T.-A. Shibata K. Shigaki T. Shiina M. Shimomura A. Sickles C.L. Silva D. Silvermyr K.S. Sim C.P. Singh V. Singh F.W. Sippach M. Sivertz H.D. Skank G.A. Sleege D.E. Smith G. Smith M.C. Smith 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 S. Takagi E.M. Takagui A. Taketani M. Tamai K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum V. Tarakanov A. Taranenko P. Tarjan J.D. Tepe T.L. Thomas M. Togawa J. Tojo H. Torii R.S. Towell V.-N. Tram 3 V. Trofimov I. Tserruya Y. Tsuchimoto H. Tsuruoka S.K. Tuli H. Tydesjo N. Tyurin T.J. Uam H.W. van Hecke A.A. Vasiliev M. Vassent 2 J. Velkovska M. Velkovsky W. Verhoeven V. Veszpremi L. Villatte A.A. Vinogradov M.A. Volkov E. Vznuzdaev X.R. Wang Y. Watanabe S.N. White B.R. Whitus N. Willis 4 A.L. Wintenberg 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 L. Zhang S. Zhou S.J. Zhou J. Zimanyi L. Zolin X. Zong
Abstract : Transverse momentum $\P_{T}$ spectra measured by the PHENIX experiment at RHIC in Au + Au, d + Au and pp collisions at $\sqrt {^S{NN}} = 200 GeV$ and in Au + Au collisions at $\sqrt {^S{NN}} = 62.4 GeV$ are presented. A suppression of the yield of high $\P_{T}$ hadrons in central Au + Au collisions by a factor 4-5 at $\P_{T}>5$ is found relative to the pp reference scaled by the nuclear overlap function $(\T_{AB})$ . In contrast, direct photons are not suppressed in central Au + Au collisions and no suppression of high $\P_{T}$ particles can be seen in d + Au collisions. This leads to the conclusion that the dense medium formed in central Au + Au collisions is responsible for the suppression.
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Submitted on : Tuesday, January 24, 2006 - 5:45:03 PM
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S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Medium effects on high $\P_{T}$ particle production measured with the PHENIX experiment. International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions - Hard Probes 2004, Nov 2004, Ericeira, Portugal. pp.303-310, ⟨10.1140/epjc/s2005-02324-8⟩. ⟨in2p3-00025491⟩

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