Spectra and ratios of identified particles in Au+Au and d+Au collisions at sqrt(s_NN)=200 GeV

A Adare,Serguei Afanasiev,C Aidala,N N Ajitanand,Y Akiba,H Albataineh,J P Alexander, A Angerami,K Aoki,N Apadula,Y Aramaki,E T Atomssa, R Averbeck,T C Awes,B Azmoun,V Babintsev,M Bai,G Baksay,L Baksay,K N Barish,B Bassalleck,Austin Basye,S Bathe,V Baublis,C Baumann,A Bazilevsky,S Belikov,R Belmont,R A Bennett,A Berdnikov,Y Berdnikov,Jihyun Bhom,A A Bickley,D Blau,J S Bok,Kristen E Boyle,M L Brooks,H Buesching,V Bumazhnov,G Bunce,S Butsyk,C M Camacho,S Campbell,A Caringi,C H Chen,C Y Chi,Minsen Chiu,Il Ju Choi,Jae Boong Choi, R K Choudhury,P Christiansen,T Chujo,P Chung,O Chvala,V Cianciolo,Zvi Hirsh Citron,B A Cole,Z Conesa Del Valle,M Connors,P Constantin,M Csanad,T Csorgő,T Dahms,S Dairaku,I Danchev,Koushik K Das,Amitabha Datta,G David,M K Dayananda,Alexey Yu Denisov,A Deshpande,E J Desmond,K V Dharmawardane,O Dietzsch,A Dion,M Donadelli,O Drapier,A Drees,K A Drees,J M Durham,A Durum, D Dutta,L Dorazio,S Edwards,Y V Efremenko,F Ellinghaus,T Engelmore,A Enokizono,H Enyo, S Esumi,B Fadem,D E Fields,M Finger,F Fleuret,S L Fokin,Z Fraenkel,J E Frantz,A Franz,A D Frawley,K Fujiwara,Y Fukao,T Fusayasu,I Garishvili,A Glenn,Huili Gong,M Gonin,Y Goto,R Granier De Cassagnac,N Grau,S V Greene,G Grim,M Grosse Perdekamp,T Gunji,H A Gustafsson,J S Haggerty,K I Hahn, H Hamagaki,J Hamblen,Ruoping Han,J Hanks,E P Hartouni,E Haslum,R S Hayano,Xinbo He,M Heffner,T K Hemmick,T Hester, J C Hill, M Hohlmann,W Holzmann,K Homma,B Hong,T Horaguchi,D Hornback, Shaomin Huang,T Ichihara,R Ichimiya,J Ide,Yujiro Ikeda, Kunitoshi Imai,Masaaki Inaba,D Isenhower,M Ishihara,Takanori Isobe,M Issah,A Isupov,D Ivanischev,Y Iwanaga,B V Jacak,Juncheng Jia,X Jiang, Jianguo Jin,B M Johnson,T W Jones,K S Joo,D Jouan,D S Jumper,F Kajihara,S Kametani,N Kamihara,J Kamin, J H Kang,J S Kapustinsky,K Karatsu,Mari Kasai,D Kawall,Masahiro Kawashima,A V Kazantsev,T Kempel,A Khanzadeev,K M Kijima,J Kikuchi,A Kim,B I Kim,Dong Hwan Kim,E J Kim, Sung Ho Kim,Y J Kim, E Kinney,K Kiriluk, Andrew M Kiss,E Kistenev,D Kleinjan,L Kochenda,B Komkov,M Konno,Jan Koster,D Kotchetkov,Andrey V Kozlov,A Kral,A Kravitz,G J Kunde,K Kurita,Minoru Kuribayashi Kurosawa,Y Kwon,G S Kyle,R Lacey,Yue Shi Lai,J G Lajoie,A A Lebedev, D M Lee,J Lee,K B Lee,M J Leitch, M A L Leite,E Leitner,B Lenzi,Xiaohui Li,P Lichtenwalner,P Liebing,L A Linden Levy,T Liska,A Litvinenko,Hui Liu,M X Liu,B Love,R Luechtenborg,David A Lynch, C Maguire,Y I Makdisi,A Malakhov,M D Malik,V I Manko, Eric James Mannel,Y Mao,H Masui,F Matathias,M Mccumber,P L Mcgaughey,D Mcglinchey,N Means,B Meredith, Y Miake,T Mibe, A C Mignerey,P Mikes,Kazumasa Miki,A Milov, Meenakshi Mishra,J T Mitchell,A K Mohanty,Hwa Jin Moon,Y Morino,A Morreale,D P Morrison,T V Moukhanova,Taro Murakami,J Murata,S Nagamiya,J L Nagle,M Naglis,M I Nagy,I Nakagawa,Y Nakamiya,K Nakamura,Tomoyuki Nakamura,Koji Nakano,Soonkwon Nam,J Newby,M Nguyen,M Nihashi,R Nouicer,A S Nyanin, C M Oakley,E Obrien,S Oda,C A Ogilvie,Masanori Oka, Kunihiro Okada,Y Onuki, A Oskarsson,M Ouchida,K Ozawa,R Pak,V Pantuev, V Papavassiliou,I H Park, Junhong Park, Stephen K Park,W J Park,S F Pate,H Pei,J C Peng,H Pereira,V Peresedov,D Yu Peressounko,R Petti,C Pinkenburg,R P Pisani,M Proissl,M L Purschke,A K Purwar,H Qu,J Rak,A Rakotozafindrabe,I Ravinovich,K F Read,S Rembeczki,K Reygers,V Riabov,Y Riabov,E Richardson,D Roach, Guillaume De La Roche,S D Rolnick,M Rosati,C A Rosen, S S E Rosendahl, P Rosnet, P A Rukoyatkin,P Ružicka,B Sahlmueller,Naoto Saito,Takemasa Sakaguchi,K Sakashita,V Samsonov,Shigetoshi Sano,Takehiko Sato,Stephen G Sawada,K Sedgwick,J Seele,R Seidl,A Yu Semenov, R Seto,D N Sharma,I Shein,T A Shibata,K Shigaki,M Shimomura,Kazuhiko Shoji,Prashant Shukla,A Sickles,C L Silva,D Silvermyr,C Silvestre,K S Sim,B K Singh,C P Singh,V S Singh,M Slunecka,R A Soltz,W E Sondheim,S P Sorensen,I V Sourikova,N A Sparks,P W Stankus, E Stenlund,S P Stoll,T Sugitate,A Sukhanov,J Sziklai,E M Takagui,A Taketani,R Tanabe, Yasuki Tanaka,Subhash C Taneja,K Tanida,M J Tannenbaum,Sujata Tarafdar,A Taranenko,P Tarjan,H Themann,D W Thomas,T L Thomas,M Togawa,A Toia,L Tomasek,H Torii,R S Towell,I Tserruya,Y Tsuchimoto,C Vale,H Valle,H W Van Hecke,E Vazquezzambrano,A Veicht,J Velkovska,R Vertesi, A Vinogradov,M Virius, V Vrba,E Vznuzdaev,X R Wang,Daisuke Watanabe, Katsumi Watanabe, Yu Watanabe,Fuchan Wei,Rui Wei, J P Wessels,Sebastian White,D Winter,J P Wood,C L Woody,R M Wright,M Wysocki,Wei Xie, Y Yamaguchi,K Yamaura,R Yang,A Yanovich,J Ying,S Yokkaichi,Z You,G R Young,I Younus,I E Yushmanov,W A Zajc,Chenxi Zhang,S Zhou,L Zolin

PHYSICAL REVIEW C（2013）

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摘要

The transverse momentum (p(T)) spectra and ratios of identified charged hadrons (pi(+/-), K-+/-, p, (p) over bar) produced in root s(NN) = 200 GeV Au + Au and d + Au collisions are reported in five different centrality classes for each collision species. The measurements of pions and protons are reported up to p(T) = 6 GeV/c (5 GeV/c), and the measurements of kaons are reported up to p(T) = 4 GeV/c (3.5 GeV/c) in Au + Au (d + Au) collisions. In the intermediate p(T) region, between 2 and 5 GeV/c, a significant enhancement of baryon-to-meson ratios compared to those measured in p + p collisions is observed. This enhancement is present in both Au + Au and d + Au collisions and increases as the collisions become more central. We compare a class of peripheral Au + Au collisions with a class of central d + Au collisions which have a comparable number of participating nucleons and binary nucleon-nucleon collisions. The p(T)-dependent particle ratios for these classes display a remarkable similarity, which is then discussed.

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