Transition In Yield And Azimuthal Shape Modification In Dihadron Correlations In Relativistic Heavy Ion Collisions

A. Adare, S. Afanasiev, C. Aidala,N. N. Ajitanand,Y. Akiba,H. Al-Bataineh, J. Alexander,K. Aoki,L. Aphecetche,Y. Aramaki,J. Asai,E. Atomssa, R. Averbeck,T. Awes,B. Azmoun,V. Babintsev,M. Bai,G. Baksay,L. Baksay, A. Baldisseri,K. Barish,P. Barnes,B. Bassalleck,A. Basye,S. Bathe,S. Batsouli,V. Baublis,C. Baumann, A. Bazilevsky,S. Belikov,R. Belmont,R. Bennett,A. Berdnikov,Y. Berdnikov,A. Bickley,J. Boissevain,J. Bok,H. Borel,K. Boyle,M. Brooks,H. Buesching,V. Bumazhnov,G. Bunce,S. Butsyk,C. Camacho,S. Campbell,B. Chang,W. Chang,J.-L. Charvet,C.-H. Chen,S. Chernichenko,C. Chi,M. Chiu,I. Choi,R. Choudhury,P. Christiansen,T. Chujo,P. Chung,A. Churyn,O. Chvala,V. Cianciolo,Z. Citron,B. Cole,M. Connors,P. Constantin,M. Csanád,T. Csörgő,T. Dahms,S. Dairaku,I. Danchev,K. Das,A. Datta,G. David,A. Denisov,D. d’Enterria,A. Deshpande,E. Desmond,O. Dietzsch,A. Dion,M. Donadelli,O. Drapier,A. Drees,K. Drees,A. Dubey,J. Durham,A. Durum, D. Dutta,V. Dzhordzhadze,S. Edwards,Y. Efremenko,F. Ellinghaus,T. Engelmore,A. Enokizono,H. En’yo, S. Esumi,K. Eyser,B. Fadem,D. Fields,M. Finger,F. Fleuret,S. Fokin, Z. Fraenkel,J. Frantz,A. Franz,A. Frawley,K. Fujiwara,Y. Fukao,T. Fusayasu,I. Garishvili,A. Glenn,H. Gong, M. Gonin,J. Gosset,Y. Goto,R. Granier de Cassagnac, N. Grau,S. Greene,M. Grosse Perdekamp,T. Gunji,H.-Å. Gustafsson,A. Hadj Henni,J. Haggerty,K. Hahn, H. Hamagaki,J. Hamblen,J. Hanks, R. Han,E. Hartouni,K. Haruna,E. Haslum,R. Hayano,M. Heffner,S. Hegyi,T. Hemmick,T. Hester,X. He,J. Hill, M. Hohlmann,W. Holzmann,K. Homma,B. Hong,T. Horaguchi,D. Hornback,S. Huang,T. Ichihara,R. Ichimiya,J. Ide,H. Iinuma,Y. Ikeda,K. Imai,J. Imrek,M. Inaba,D. Isenhower,M. Ishihara,T. Isobe,M. Issah,A. Isupov,D. Ivanischev,B. Jacak, J. Jia,J. Jin,B. Johnson,K. Joo,D. Jouan,D. Jumper,F. Kajihara,S. Kametani,N. Kamihara,J. Kamin,J. Kang,J. Kapustinsky,D. Kawall,M. Kawashima,A. Kazantsev,T. Kempel,A. Khanzadeev,K. Kijima,J. Kikuchi,B. Kim,D. Kim,E. Kim,S. Kim,Y. Kim, E. Kinney,K. Kiriluk,Á. Kiss,E. Kistenev,J. Klay,C. Klein-Boesing,L. Kochenda,B. Komkov,M. Konno,J. Koster,D. Kotchetkov, A. Kozlov,A. Král,A. Kravitz,G. Kunde,K. Kurita,M. Kurosawa,M. Kweon,Y. Kwon,G. Kyle,R. Lacey, Y. Lai,J. Lajoie,D. Layton, A. Lebedev,D. Lee,J. Lee,K. Lee,K. B. Lee,T. Lee,M. Leitch,M. Leite,E. Leitner,B. Lenzi,P. Liebing,L. Linden Levy,T. Liška,A. Litvinenko, H. Liu,M. Liu,X. Li,B. Love,R. Luechtenborg,D. Lynch, C. Maguire,Y. Makdisi,A. Malakhov,M. Malik,V. Manko,E. Mannel,Y. Mao,L. Mašek,H. Masui,F. Matathias,M. McCumber,P. McGaughey,N. Means,B. Meredith, Y. Miake,A. Mignerey,P. Mikeš,K. Miki,A. Milov,M. Mishra,J. Mitchell,A. Mohanty,Y. Morino,A. Morreale,D. Morrison,T. Moukhanova,D. Mukhopadhyay,J. Murata,S. Nagamiya,J. Nagle,M. Naglis,M. Nagy,I. Nakagawa,Y. Nakamiya,T. Nakamura,K. Nakano,J. Newby,M. Nguyen,T. Niita,R. Nouicer,A. Nyanin,E. O’Brien,S. Oda,C. Ogilvie, K. Okada,M. Oka,Y. Onuki, A. Oskarsson,M. Ouchida,K. Ozawa, R. Pak,A. Palounek,V. Pantuev, V. Papavassiliou,I. Park,J. Park,S. Park, W. Park,S. Pate,H. Pei,J.-C. Peng,H. Pereira,V. Peresedov,D. Peressounko,C. Pinkenburg,R. Pisani,M. Proissl,M. Purschke, A. Purwar,H. Qu,J. Rak,A. Rakotozafindrabe,I. Ravinovich,K. Read,S. Rembeczki,K. Reygers,V. Riabov,Y. Riabov,E. Richardson,D. Roach, G. Roche,S. Rolnick,M. Rosati,C. Rosen, S. Rosendahl, P. Rosnet,P. Rukoyatkin,P. Ružička,V. Rykov,B. Sahlmueller,N. Saito,T. Sakaguchi,S. Sakai,K. Sakashita,V. Samsonov,S. Sano,T. Sato,S. Sawada,K. Sedgwick,J. Seele,R. Seidl,A. Semenov,V. Semenov, R. Seto,D. Sharma,I. Shein,T.-A. Shibata,K. Shigaki,M. Shimomura,K. Shoji,P. Shukla,A. Sickles,C. Silva,D. Silvermyr,C. Silvestre,K. Sim,B. Singh,C. Singh,V. Singh,M. Slunečka,A. Soldatov,R. Soltz,W. Sondheim,S. Sorensen,I. Sourikova,N. Sparks,F. Staley,P. Stankus, E. Stenlund,M. Stepanov,A. Ster,S. Stoll,T. Sugitate, C. Suire,A. Sukhanov,J. Sziklai,E. Takagui,A. Taketani,R. Tanabe,Y. Tanaka,K. Tanida,M. Tannenbaum,S. Tarafdar,A. Taranenko,P. Tarján,H. Themann, T. Thomas,M. Togawa,A. Toia,L. Tomášek,Y. Tomita,H. Torii,R. Towell,V. N. Tram,I. Tserruya,Y. Tsuchimoto,C. Vale,H. Valle,H. van Hecke,E. Vazquez-Zambrano,A. Veicht,J. Velkovska,R. Vértesi, A. Vinogradov,M. Virius, V. Vrba,E. Vznuzdaev,X. Wang,D. Watanabe, K. Watanabe,Y. Watanabe,F. Wei,R. Wei,J. Wessels,S. White,D. Winter,J. Wood,C. Woody,R. Wright,M. Wysocki, W. Xie, Y. Yamaguchi,K. Yamaura,R. Yang,A. Yanovich,J. Ying,S. Yokkaichi,G. Young,I. Younus,Z. You,I. Yushmanov,W. Zajc,O. Zaudtke,C. Zhang,S. Zhou,L. Zolin,S. Zhou,L. Zolin

PHYSICAL REVIEW LETTERS(2010)

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摘要
Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of pi(0) trigger particles at transverse momenta p(T)(t) = 4-12 GeV/c and associated charged hadrons (p(T)(a) = 0.5-7 GeV/c) vs relative azimuthal angle Delta phi in Au + Au and p + p collisions at root s(NN) = 200 GeV. The Au + Au distribution at low p(T)(a), whose shape has been interpreted as a medium effect, is modified for p(T)(t) < 7 GeV/c. At higher p(T)(t), the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p(T)(a), which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au + Au relative to p + p (I-AA) is suppressed at high p(T) (I-AA approximate to 0.35-0.5), but less than for inclusive suppression (R-AA approximate to 0.2).
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