Suppression of away-side jet fragments with respect to the reaction plane in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV

A Adare,P L Mcgaughey,H Iinuma, T Engelmore,A Morreale,A Soldatov,J Kikuchi,J Ide,T Chujo,R Seidl,F Fleuret,C Maguire,P Chung,J Jin,Taewoo Lee,A Sukhanov,David W Lynch,H Masui,A Franz,Eun Jin Kim,K S Sim,A Litvinenko,T Csorgo,P Shukla,E Haslum,Yuichiro Watanabe,C Aidala,Kinkar Ch Das,S D Rolnick,N A Sparks,M J Tannenbaum,A Rakotozafindrabe,S N White,T V Moukhanova,A Drees,A Toia,Xiaoqing He,S Batsouli, R K Choudhury, Y Miake,J P Wessels,Ki Bong Lee,N Grau,A Veicht,T Dahms,B V Jacak,S Chernichenko,F Ellinghaus,L Kochenda,V Pantuev,V Cianciolo,J Gosset,M Togawa,M Gonin,M Slunecka,V K Semenov,D P Morrison,B Bassalleck,J S Haggerty,Shuai Huang,J Velkovska,V I Manko,S F Pate,Kosaku Fujiwara,J Seele,Yue Shi Lai,Xia Li,H Torii,G R Young,K A Drees,B K Singh,E Kistenev,Y Riabov,W E Sondheim,H Pereira,A Durum,N Kamihara,K Tanida,M Csanad, A C Mignerey,D Isenhower,T Sakaguchi,C Baumann,Y J Kim,I Nakagawa, T Sugitate,E T Atomssa,M L Brooks,Kevin J Boyle,J Asai,A Ster,V Bumazhnov,P A Rukoyatkin,K Shigaki,B Lenzi,B S Chang,S L Fokin, Yusuke Tomita,G Roche,D Kotchetkov,S Nagamiya,J Koster,J Hamblen,L Baksay,E Mannel,Y Nakamiya,M X Liu,V Baublis,P Christiansen,S V Greene,J S Kapustinsky,D Yu Peressounko,T Liska, S Esumi,Toshihiro Isobe,Masayuki Inaba,B Hong,G Baksay,J Murata, S A Edwards,S Oda,T Nakamura,J Hanks,Vn Tram,Dipanwita Dutta, A Kiss,Satoshi Sakai,J Newby,M Ouchida,R Granier De Cassagnac,D Mukhopadhyay,D Winter,K Sakashita, A Vinogradov,H Valle,I H Park,M Wysocki,D Ivanischev, Kazunari Yamaura,S Tarafdar,David Denterria,J S Bok,I Garishvili,Y Aramaki,L Tomasek,C M Camacho, M A L Leite, S K Park,D M Lee,T Niita,E Vazquezzambrano,M Bai,M Virius,M L Purschke,T Fusayasu,B Fadem,A Yanovich,S Sano,R M Wright,H Pei,S P Stoll, S S E Rosendahl,M J Leitch,J Kamin, A K Dubey,D Hornback,A S Nyanin,T A Shibata,R Bennett,Rayyeng Yang, A Kravitz,K Kurita, J C Hill,T Gunji,Yoshikazu Tanaka,R S Towell, Jiangyong Jia,O Zaudtke,D N Sharma, E Kinney,A Dion,R Pak, M Finger,Y Berdnikov, R Seto,I V Sourikova,B Meredith,K I Hahn, Kenichiro Imai,A Denisov,M Grosse Perdekamp,A Churyn, S Afanasiev,W C Chang, P Rosnet,H A Gustafsson,E Leitner,I Younus,Hongliang Liu,N Means,Kunio Miki,R Luechtenborg,F Kajihara,L Zolin,J Rak,M Proissl,M Shimomura,H W Van Hecke,B Azmoun,A Bazilevsky,H Albataineh,O Drapier, G David,M Chiu,D E Fields,P Constantin,A K Mohanty,S Belikov, Viktor Riabov,M Donadelli,K O Eyser,C P Singh,T K Hemmick,Masanori Oka,Haimei Gong,H Borel,S P Sorensen,B Love,J L Charvet,Zvi Hirsh Citron,C L Woody, C H Chen,S Butsyk,L Masek,F Matathias,E Richardson,Jaehyun Park, E Obrien,C Silvestre, A Kozlov,I Ravinovich,J Imrek,P Liebing,F Staley,S Zhou,Weibo Xie,X R Wang,A Malakhov,Rui Han,Austin Basye,K F Read,J E Frantz,O Chvala,R S Hayano,Z Fraenkel,M Kurosawa,G J Kunde,Y Goto,C Vale,J G Lajoie,M D Malik,H Enyo,A Kral, M Hohlmann,I E Yushmanov,E M Takagui,A Hadj Henni,L Aphecetche,K Sedgwick,D Jouan,M Nguyen,Z You,J T Mitchell,R Vertesi,M Heffner,T Horaguchi,S Yokkaichi,D Roach, R A Soltz,K Homma,A Sickles,Yoshihiko Ikeda,I J Choi,A V Kazantsev,M Issah,A K Purwar, A Oskarsson,A Milov,Daisuke Watanabe,V Papavassiliou,Nobuhiko Saito,S Rembeczki, E Stenlund,K N Barish,A A Bickley,K Reygers,M Rosati,A D Frawley,V Dzhordzhadze,M Stepanov,P D Barnes,C Zhang, Y Yamaguchi,C Kleinboesing,A Berdnikov, J Alexander,M Konno,N N Ajitanand,H Buesching,R Ichimiya,G S Kyle,Y Onuki, A Lebedev,K S Joo,P Ruzicka,D Kawall,J P Wood,P W Stankus,Y Tsuchimoto,Katsunori Aoki,J Sziklai, S H Kim,T L Thomas,C Pinkenburg,L A Linden Levy,K Ozawa,Ryo Tanabe,G Bunce,T C Awes,H Themann, Taichi Sato,C Y Chi,E J Desmond,Masahiro Kawashima,J C Peng,D Silvermyr,V L Rykov,Ran Wei, C Suire,Y Fukao, Kikuo Nakano,S Bathe,Y I Makdisi,Yoowook Kwon, Jeonghan Lee,K Kiriluk,V Samsonov,A Taketani,O Dietzsch,Woo Jin Park,M Ishihara,B Sahlmueller,P Mikes,K Shoji,I Shein,Fuwen Wei,B A Cole,S Kametani,Kenji Okada,A Yu Semenov,J Ying,T Ichihara,R Nouicer,Y Morino,Y V Efremenko, Sosaku Sawada,Shannon C Campbell,Munmaya K Mishra,T Hester,H Qu,M J Kweon,Byung Ik Kim,D J Kim,R Belmont,E P Hartouni,T Kempel,K M Kijima, A Baldisseri, R Averbeck,A Isupov,V Singh,K Karatsu, V Vrba,W A Zajc,D Layton,R Lacey,B M Johnson,V Babintsev,I Tserruya,Y Mao,B Komkov,D S Jumper,K Haruna, C A Ogilvie,A Glenn, H Hamagaki,C L Silva,J Klay,J M Durham,S Dairaku,Y Akiba,E Vznuzdaev,J G Boissevain,V Peresedov,I Danchev,M Naglis,A Datta,P Tarjan,A Taranenko,Kazuhiro Watanabe,J L Nagle,M Mccumber, J H Kang,W Holzmann,A P T Palounek,A Enokizono,A Deshpande,M Connors, R P Pisani,M I Nagy,C A Rosen,A Khanzadeev

PHYSICAL REVIEW C（2011）

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摘要

Pair correlations between large transverse momentum neutral pion triggers (p(T) = 4-7 GeV/c) and charged hadron partners (p(T) = 3-7 GeV/c) in central (0%-20%) and midcentral (20%-60%) Au + Au collisions at root s(NN) = 200 GeV are presented as a function of trigger orientation with respect to the reaction plane. The particles are at larger momentum than where jet shape modifications have been observed, and the correlations are sensitive to the energy loss of partons traveling through hot densematter. An out-of-plane trigger particle produces only 26 +/- 20% of the away-side pairs that are observed opposite of an in-plane trigger particle for midcentral (20%-60%) collisions. In contrast, near-side jet fragments are consistent with no suppression or dependence on trigger orientation with respect to the reaction plane. These observations are qualitatively consistent with a picture of little near-side parton energy loss either due to surface bias or fluctuations and increased away-side parton energy loss due to a long path through the medium. The away-side suppression as a function of reaction-plane angle is shown to be sensitive to both the energy loss mechanism and the space-time evolution of heavy-ion collisions.

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