High-p_T Charged Hadron Suppression in Au+Au Collisions at Sqrt(s_nn) = 200 GeV

SS Adler,S Afanasiev,C Aidala,NN Ajitanand,Y Akiba,J Alexander,R Amirikas,L Aphecetche,SH Aronson,R Averbeck,TC Awes,R Azmoun, V Babintsev,A Baldisseri,KN Barish, PD Barnes,B Bassalleck,S Bathe,S Batsouli,V Baublis,A Bazilevsky,S Belikov,Y Berdnikov,S Bhagavatula,JG Boissevain,H Borel,S Borenstein,ML Brooks,DS Brown,N Bruner,D Bucher,H Buesching,V Bumazhnov,G Bunce, JM Burward-Hoy,S Butsyk,X Camard,JS Chai, P Chand,WC Chang,S Chernichenko,CY Chi,J Chiba,M Chiu, IJ Choi,J Choi,RK Choudhury,T Chujo,V Cianciolo,Y Cobigo,BA Cole,P Constantin,DG d'Enterria,G David,H Delagrange,A Denisov, A Deshpande,EJ Desmond,O Dietzsch,O Drapier,A Drees,R du Rietz,A Durum,D Dutta,YV Efremenko,K El Chenawi,A Enokizono,H En'yo,S Esumi,L Ewell,DE Fields,F Fleuret,SL Fokin,BD Fox,Z Fraenkel,JE Frantz,A Franz,AD Frawley,SY Fung,S Garpman,TK Ghosh,A Glenn,G Gogiberidze,M Gonin,J Gosset,Y Goto,RG de Cassagnac,N Grau,SV Greene,MG Perdekamp,W Guryn,HA Gustafsson, T Hachiya,JS Haggerty,H Hamagaki,AG Hansen,EP Hartouni,M Harvey,R Hayano,X He,M Heffner,TK Hemmick,JM Heuser,M Hibino,JC Hill,W Holzmann,K Homma,B Hong,A Hoover,T Ichihara,VV Ikonnikov,K Imai,D Isenhower,M Ishihara,M Issah,A Isupov,BV Jacak,WY Jang,Y Jeong,J Jia,O Jinnouchi,BM Johnson,SC Johnson,KS Joo,D Jouan,S Kametani,N Kamihara,JH Kang,SS Kapoor,K Katou, S Kelly,B Khachaturov, A Khanzadeev,J Kikuchi,DH Kim,DJ Kim,DW Kim,E Kim,GB Kim,HJ 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,PJ Kroon,CH Kuberg,K Kurita,Y Kuroki, MJ Kweon,Y Kwon,GS Kyle,R Lacey,V Ladygin,JG Lajoie,A Lebedev,S Leckey,DM Lee,S Lee,MJ Leitch,XH Li,H Lim,A Litvinenko,MX Liu, Y Liu,CF Maguire,YI Makdisi, A Malakhov,VI Manko,Y Mao,G Martinez, MD Marx,H Masui,F Matathias,T Matsumoto,PL McGaughey, E Melnikov,F Messer,Y Miake,J Milan,TE Miller,A Milov,S Mioduszewski,RE Mischke,GC Mishra,JT Mitchell,AK Mohanty,DP Morrison,JM Moss,F Muhlbacher,D Mukhopadhyay,M Muniruzzaman,J Murata,S Nagamiya,JL Nagle,T Nakamura,BK Nandi,M Nara,J Newby,P Nilsson,AS Nyanin,J Nystrand,E O'Brien,CA Ogilvie,H Ohnishi,ID Ojha, K Okada,M Ono,V Onuchin,A Oskarsson,I Otterlund,K Oyama,K Ozawa,D Pal,APT Palounek,VS Pantuev,V Papavassiliou,J Park,A Parmar,SF Pate,T Peitzmann,JC Peng,V Peresedov,C Pinkenburg,RP Pisani,F Plasil,ML Purschke,AK Purwar,J Rak,I Ravinovich,KF Read,M Reuter,K Reygers,V Riabov,Y Riabov,G Roche,A Romana,M Rosati,P Rosnet,SS Ryu,ME Sadler,N Saito,T Sakaguchi,M Sakai,S Sakai,V Samsonov,L Sanfratello,R Santo,HD Sato,S Sato,S Sawada,Y Schutz,V Semenov,R Seto,MR Shaw, TK Shea,TA Shibata,K Shigaki,T Shiina,CL Silva,D Silvermyr,KS Sim,CP Singh,V Singh,M Sivertz,A Soldatov,RA Soltz,WE Sondheim,SP Sorensen,IV Sourikova,F Staley,PW Stankus, E Stenlund,M Stepanov,A Ster,SP Stoll,T Sugitate, JP Sullivan,EM Takagui,A Taketani, M Tamai,KH Tanaka,Y Tanaka,K Tanida,MJ Tannenbaum,P Tarjan,JD Tepe,TL Thomas,J Tojo,H Torii,RS Towell,I Tserruya,H Tsuruoka,SK Tuli,H Tydesjo,N Tyurin,HW van Hecke,J Velkovska, M Velkovsky,L Villatte,AA Vinogradov,MA Volkov,E Vznuzdaev,XR Wang,Y Watanabe,SN White,FK Wohn,CL Woody,W Xie,Y Yang,A Yanovich,S Yokkaichi,GR Young,IE Yushmanov,WA Zajc, C Zhang,S Zhou,L Zolin

PHYSICAL REVIEW C（2004）

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摘要

The PHENIX experiment at RHIC has measured charged hadron yields atmid-rapidity over a wide range of transverse momentum (0.5 < p_T < 10 GeV/c) inAu+Au collisions at sqrt(s_NN)=200 GeV. The data are compared to pi^zeromeasurements from the same experiment. For both charged hadrons and neutralpions, the yields per nucleon-nucleon collision are significantly suppressed incentral compared to peripheral and nucleon-nucleon collisions. The suppressionsets in gradually and increases with increasing centrality of the collisions.Above 4-5 GeV/c in p_T, a constant and almost identical suppression of chargedhadrons and pi^zeroes is observed. The p_T spectra are compared to publishedspectra from Au+Au at sqrt(s_NN)=130 in terms of x_t scaling. Central andperipheral pi^zero as well as peripheral charged spectra exhibit the same x_tscaling as observed in p+p data.

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