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Nuclear Modification Factors for Hadrons At Forward and Backward Rapidities in Deuteron-Gold Collisions at $\sqrt S_{NN}$ = 200 GeV

S.S. Adler S. Afanasiev C. Aidala N.N. Ajitanand Y. Akiba J. Alexander Laurent Aphecetche 1 S.H. Aronson R. Averbeck T.C. Awes V. Babintsev K.N. Barish B. Bassalleck V. Baublis F. Bauer A. Bazilevsky S. Belikov M.T. Bjorndal J.G. Boissevain H. Borel M.L. Brooks D.S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J.M. Burward-Hoy S. Butsyk X. Camard 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 M.P. Comets 2 P. Constantin M. Csanad T. Csörgö Jean-Pierre Cussonneau 1 D. d'Enterria K. Das G. David F. Deak H. Delagrange 1 A. Denisov A. Deshpande E.J. Desmond A. Devismes O. Dietzsch J.L. Drachenberg O. Drapier 3 A. Drees A. Durum D. Dutta V. Dzhordzhadze Y.V. Efremenko H. En'Yo B. Espagnon 2 S. Esumi D.E. Fields C. Finck F. Fleuret 3 S.L. Fokin B.D. Fox Z. Fraenkel J.E. Frantz A. Franz A.D. Frawley Y. Fukao S.Y. Fung S. Gadrat 4 Marie Germain 1 A. Glenn M. Gonin 3 J. Gosset Y. Goto R. Granier de Cassagnac 3 N. Grau S.V. Greene M. Grosse Perdekamp H.A. Gustafsson T. Hachiya J.S. Haggerty H. Hamagaki A.G. Hansen E.P. Hartouni M. Harvey K. Hasuko R. Hayano X. He M. Heffner T.K. Hemmick J.M. Heuser P. Hidas H. Hiejima J.C. Hill R. Hobbs W. Holzmann K. Homma B. Hong A. Hoover T. Horaguchi T. Ichihara V.V. Ikonnikov K. Imai M. Inaba D. Isenhower L. Isenhower M. Ishihara M. Issah A. Isupov B.V. Jacak J. Jia O. Jinnouchi B.M. Johnson S.C. Johnson K.S. Joo D. Jouan 2 F. Kajihara S. Kametani N. Kamihara J.H. Kang K. Katou T. Kawabata Steven Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D.J. Kim E. Kim G.B. Kim 3 H.J. Kim E. Kinney A. Kiss E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov R. Kohara B. Komkov M. Konno M. Kopytine D. Kotchetkov A. Kozlov P.J. Kroon C.H. Kuberg G.J. Kunde K. Kurita M.J. Kweon Y. Kwon G.S. Kyle R. Lacey J.G. Lajoie Y. Le Bornec 2 A. Lebedev S. Leckey D.M. Lee M.J. Leitch M.A.L. Leite X.H. Li H. Lim A. Litvinenko M.X. Liu C.F. Maguire Y.I. Makdisi A. Malakhov V.I. Manko Y. Mao Gines Martinez Garcia 1 H. Masui F. Matathias T. Matsumoto M.C. Mccain P.L. Mcgaughey Y. Miake T.E. Miller A. Milov S. Mioduszewski G.C. Mishra J.T. Mitchell A.K. Mohanty D.P. Morrison J.M. Moss D. Mukhopadhyay M. Muniruzzaman S. Nagamiya J.L. Nagle T. Nakamura J. Newby A.S. Nyanin J. Nystrand E. O'Brien C.A. Ogilvie H. Ohnishi I.D. Ojha K. Okada H. Okada A. Oskarsson I. Otterlund K. Oyama K. Ozawa D. Pal A.P.T. Palounek V.S. Pantuev V. Papavassiliou J. Park S.F. Pate H. Pei V. Penev J.C. Peng H. Pereira V. Peresedov A. Pierson C. Pinkenburg R.P. Pisani M.L. Purschke A. Purwar J.M. Qualls J. Rak I. Ravinovich K.F. Read M. Reuter K. Reygers V. Riabov Y. Riabov G. Roche 4 A. Romana 3 M. Rosati S.S.E. Rosendahl P. Rosnet 4 V.L. Rykov S.S. Ryu 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 T.K. Shea I. Shein T.A. Shibata K. Shigaki M. Shimomura A. Sickles C.L. Silva D. Silvermyr K.S. Sim 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 K.H. Tanaka Y. Tanaka K. Tanida M.J. Tannenbaum A. Taranenko P. Tarjan T.L. Thomas M. Togawa J. Tojo H. Torii R.S. Towell V.-N. Tram I. Tserruya Y. Tsuchimoto H. Tydesjo N. Tyurin T.J. Uam J. Velkovska M. Velkovsky V. Veszpremi A.A. Vinogradov M.A. Volkov E. Vznuzdaev X.R. Wang Y. Watanabe S.N. White N. Willis 2 F.K. Wohn C.L. Woody W. Xie A. Yanovich S. Yokkaichi G.R. Young I.E. Yushmanov W.A. Zajc C. Zhang S. Zhou J. Zimanyi L. Zolin X. Zong H.W. Vanhecke
1 SUBATECH - Laboratoire SUBATECH Nantes
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 LLR - Laboratoire Leprince-Ringuet
4 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
Abstract : We report on charged hadron production in deuteron-gold reactions at $\sqrt S_{NN}$ = 200 GeV. Our measurements in the deuteron-direction cover 1.4 < $\eta$ <$ 2.2, referred to as forward rapidity, and in the gold-direction -2.0$ <$\eta$ <$ -1.4, referred to as backward rapidity, and a transverse momentum range p$_T$ = 0.5-4.0 GeV/c. We compare the relative yields for different deuteron-gold collision centrality classes. We observe a suppression relative to binary collision scaling at forward rapidity, sensitive to low momentum fraction (x) partons in the gold nucleus, and an enhancement at backward rapidity, sensitive to high momentum fraction partons in the gold nucleus.
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http://hal.in2p3.fr/in2p3-00023513
Contributor : Suzanne Robert Connect in order to contact the contributor
Submitted on : Tuesday, January 4, 2005 - 12:47:51 PM
Last modification on : Tuesday, April 20, 2021 - 12:00:07 PM

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LPC-CLERMONT | CNRS | IPNO | LLR | SUBATECH | UNIV-NANTES | IN2P3 | X-LLR | X | PRES_CLERMONT | X-DEP-PHYS | IMT-ATLANTIQUE | SUBATECH-PLASMA | SUBATECH-XENON

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S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Nuclear Modification Factors for Hadrons At Forward and Backward Rapidities in Deuteron-Gold Collisions at $\sqrt S_{NN}$ = 200 GeV. Physical Review Letters, American Physical Society, 2005, 94, pp.082302-6. ⟨10.1103/PhysRevLett.94.082302⟩. ⟨in2p3-00023513⟩

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