Cold nuclear matter effects onJ/ψproduction as constrained by deuteron-gold measurements atsNN=200GeV

A Adare,I J Choi,A Enokizono,F Matathias,G Bunce,H Sakata,R Seto,K Katou,S Rembeczki,S Leckey,M J Tannenbaum,M J Kweon,M Slunečka,R K Choudhury,K S Sim,S Afanasiev,T K Hemmick,D Kotchetkov,J Zimányi,J Sziklai,B Bassalleck,R Kohara,K Das,M B Deaton,Y Tanaka,K O Eyser,S P Stoll,Y Nakamiya,V Cianciolo,F Kajihara,Y Tsuchimoto,I V Sourikova,I Shein,N Willis,M Gonin,A Hoover,B M Johnson,Y Fukao,J Chiba,E Stenlund,T C Awes,M Harvey,S Kametani,Y Le Bornec,G S Kyle,S Mioduszewski,T J Uam,A Durum,F K Wohn,K Dehmelt,B Love,J L Nagle,G David,T L Thomas,K Kurita,M Togawa,M Virius,P Chung,M Grosse Perdekamp,K Tanida,J S Haggerty,T Hachiya,T Ichihara,O Zaudtke,O Dietzsch,T Matsumoto,M Finger,B Khachaturov,P L Mcgaughey,D Hornback,J H Kang,L Sanfratello,L Kochenda,A V Kazantsev,S F Pate,K Boyle,I Nakagawa,B Azmoun,J M Burward-Hoy,P J Kroon,A Franz,M Issah,S H Aronson,A Ster,K Nakano,I E Yushmanov,C Silvestre,M C Mccain,C A Ogilvie,H W Van Hecke,E M Takagui,J Ying,Y Riabov,J Seele,Y Watanabe,D Jouan,N Bruner,M A L Leite,J G Lajoie,B D Fox,R P Pisani,T Liška,G Baksay,D Bucher,J G Boissevain,V Papavassiliou,H Delagrange,P Tarján,B Komkov,F Staley,C Pinkenburg,T Tabaru,K Okada,J Newby,G Roche,V Bumazhnov,T Hester,P W Stankus,N Kamihara,Z Yasin,R Seidl,M Konno,S Batsouli,V Dzhordzhadze,S Zhou,A Deshpande,A Hadj Henni,A Bazilevsky,I D Ojha,D P Morrison,Y Cobigo,P Chand,D Walker,K Shoji,V Peresedov,T K Shea,H Valle,A Pierson,D Isenhower,H Al-Bataineh,M T Bjorndal,S S Adler,C Vale,I Younus,J Kubart,M Naglis,S Yokkaichi,E Kistenev,H Hiejima,T Horaguchi,O O Omiwade,K N Barish,A Toia,S Butsyk,K Hasuko,A Romana,J Egdemir,C P Singh,D Lynch,X Camard,M Wysocki,A Devismes,A Dion,V Singh,L Aphecetche,A Churyn,D M Lee,J P Sullivan,A Taketani,A D Frawley,A Taranenko,N Kurihara,I Otterlund,D Kawall,L Baksay,E P Hartouni,S C Johnson,S Bathe,J E Frantz,A Isupov,A Drees,K Haruna,J Asai,J M Heuser,M Velkovsky,M J Leitch,R S Towell,M Mccumber,N N Ajitanand,W E Sondheim,R Bennett,M Chiu,A Shevel,H Gong,I Tserruya,K Imai,E T Atomssa,L Mašek,W A Zajc,S Chernichenko,H Pereira,M P Comets,M L Brooks,M Inuzuka,M Ouchida,H Masui,A Král,C L Woody,M Mishra,T V Moukhanova,J L Drachenberg,A Lebedev,D Winter,I Garishvili,A Yanovich,V L Rykov,S Esumi,Y I Makdisi,V Babintsev,O Drapier,B Sahlmueller,A A Bickley,M Stepanov,V Baublis,S Nagamiya,I Ravinovich,R Lacey,R Santo,A Kravitz,Y Akiba,C Haegemann,D Mukhopadhyay,M Heffner,Y Goto,J Murata,Y Berdnikov,A Denisov,D E Fields,G R Young,W Holzmann,A K Purwar,C R Cleven,E J Desmond,N Grau,W S Emam,R Pak,R Granier De Cassagnac,A Kozlov,V V Ikonnikov,S Sawada,M Rosati,J C Hill,C H Kuberg,R A Soltz,M Muniruzzaman,E Vznuzdaev,W C Chang,Z Fraenkel,C Finck ,C Maguire ,A Malakhov ,D Yu Peressounko ,R Han ,S Fokin ,Á Kiss ,B Norman ,Mathias Wagner ,J Park ,K Oyama ,S Campbell ,H Qu ,X H Li ,R Vértesi ,J Gösset ,Y Schütz ,D S Brown ,F Fleuret ,J M Moss ,F Ellinghaus ,H J Kim ,D D’enterria ,A Khanzadeev ,J P Wessels ,H Pei ,V Semenov ,T Chujo ,K Ozawa ,A Glenn ,C Suire ,E O’brien ,S Takagi ,Christian Klein-Boesing ,M Nguyen ,M Donadelli ,H Tydesjö ,B Cole ,J Alexander ,T E Miller ,S S Ryu ,A K Mohanty ,A Morreale ,T Isobe ,G B Kim ,A M Sickles ,J L Charvet ,S White ,K F Read ,W Xie ,V Kochetkov ,T Sugitate ,X He ,Hiroyuki Harada ,P Mikeš ,Jun Kikuchi ,J Jin ,K S Joo ,W J Park ,D Silvermyr ,C Zhang ,P Rukoyatkin ,A Hansen ,M Csanád ,B Lenzi ,М А Volkov ,Y Yamaguchi ,R Arméndariz ,Y V Efremenko ,H Borel ,T Gunji ,Kazuhiro Tanaka ,T Lee ,S Sakai ,Y Inoue ,Y Miake ,M Germain ,S Kelly ,M Shimomura ,P D Barnes ,B Hong ,А Виноградов ,V Manko ,J P Cussonneau ,V Samsonov ,P Hidas ,H Torii ,M L Purschke ,F Deák ,D Sharma ,B Chang ,B Espagnon ,J C Peng ,T Nakamura ,H En’yo ,A Rakotozafindrabe ,S Gadrat ,T Csörgõ ,С Беликов ,A Al-Jamel ,J L Klay ,M Reuter ,L Isenhower ,R Averbeck ,K Shigaki ,D Pal ,C A Aidala ,V Veszprémi ,H Okada ,H Hamagaki ,A Öskarsson ,K Miki ,D Dutta ,E Haslum ,A P.t Palounek ,Susumu Sato ,Y Mao ,R Hobbs ,H Ohnìshì ,M Kaneta ,K Homma ,G J Kunde ,S S.e Rosendahl ,M Hohlmann ,V Pantuev ,T Dahms ,Y Nagata ,H Lim ,K Fujiwara ,M X Liu ,J Nystrand ,J Velkovska ,Hideaki Kano ,L Zolin ,H Å Gustafsson ,J Kamin ,E Kinney ,A Soldatov ,P Constantin ,J Jia ,L Tomášek ,J M Qualls ,S Y Fung ,Kazuo Aoki ,S Greene ,J Rak ,F Bauer ,T A Shibata ,Yue Shi Lai ,E Kim ,M D Malik ,B Jacak ,A K Dubey ,V Riabov ,Hisao Kobayashi ,T Kawabata ,M Oka ,M Mitrovski ,V.n Penev ,D H Kim ,A Litvinenko ,S Oda ,S Sörensen ,M Ishihara ,T Sakaguchi ,A Milov ,N Saito ,G C Mishra ,C L Silva ,V N Tram ,V Vrba ,K Reygers ,A Nyanin ,R Hayano ,O Jinnouchi ,G Martı́nez ,C Y ,T Fusayasu ,M Inaba ,M K Lee ,S Skutnik ,H Sato ,P Rosnet ,J T Mitchell ,N Tyurin ,X Li ,H Buesching ,X R Wang ,A Baldisseri ,D J Kim ,J Tojo ,Y Kwon ,A Kiyomichi ,Xiaopeng Zong

doi:10.1103/physrevc.77.024912

Abstract

We present a new analysis of J/ψ production yields in deuteron-gold collisions at sNN=200 GeV using data taken from the PHENIX experiment in 2003 and previously published in S. S. Adler et al. [Phys. Rev. Lett 96, 012304 (2006)]. The high statistics proton-proton J/ψ data taken in 2005 are used to improve the baseline measurement and thus construct updated cold nuclear matter modification factors (RdAu). A suppression of J/ψ in cold nuclear matter is observed as one goes forward in rapidity (in the deuteron-going direction), corresponding to a region more sensitive to initial-state low-x gluons in the gold nucleus. The measured nuclear modification factors are compared to theoretical calculations of nuclear shadowing to which a J/ψ (or precursor) breakup cross section is added. Breakup cross sections of σbreakup=2.8−1.4+1.7 (2.2−1.5+1.6) mb are obtained by fitting these calculations to the data using two different models of nuclear shadowing. These breakup cross-section values are consistent within large uncertainties with the 4.2±0.5 mb determined at lower collision energies. Projecting this range of cold nuclear matter effects to copper-copper and gold-gold collisions reveals that the current constraints are not sufficient to firmly quantify the additional hot nuclear matter effect.6 MoreReceived 26 November 2007DOI:https://doi.org/10.1103/PhysRevC.77.024912©2008 American Physical Society

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