Direct Observation Of Dijets In Central Au Plus Au Collisions At Root S(Nn)=200 Gev

J. Adams,M. M. Aggarwal, Z. Ahammed,J. Amonett,B. D. Anderson, M. Anderson,D. Arkhipkin,G. S. Averichev, Y. Bai,J. Balewski,O. Barannikova,L. S. Barnby,J. Baudot,V. V. Belaga,A. Bellingeri-Laurikainen, R. Bellwied,B. I. Bezverkhny,S. Bhardwaj,A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova,L. C. Bland,C. O. Blyth,B. E. Bonner,M. Botje,J. Bouchet,A. V. Brandin,A. Bravar,M. Bystersky,R. V. Cadman,X. Z. Cai, H. Caines,J. Castillo, D. Cebra,Z. Chajecki,P. Chaloupka,S. Chattopadhyay, H. F. Chen, J. H. Chen,Y. Chen,J. Cheng,M. Cherney, A. Chikanian,H. A. Choi,W. Christie,J. P. Coffin,T. M. Cormier,M. R. Cosentino,J. G. Cramer,H. J. Crawford,M. Daugherity,M. M. de Moura,T. G. Dedovich,M. DePhillips,A. A. Derevschikov,L. Didenko,T. Dietel,P. Djawotho,S. M. Dogra,W. J. Dong, X. Dong,J. E. Draper,V. B. Dunin,J. C. Dunlop,M. R. Dutta Mazumdar,V. Eckardt,W. R. Edwards,L. G. Efimov,V. Emelianov,J. Engelage,G. Eppley,B. Erazmus, M. Estienne,R. Fatemi,J. Fedorisin,K. Filimonov,P. Filip,E. Finch,Y. Fisyak,J. Fu,C. A. Gagliardi,L. Gaillard,J. Gans,M. S. Ganti,V. Ghazikhanian,P. Ghosh,J. E. Gonzalez,Y. G. Gorbunov,H. Gos,O. Grebenyuk,D. Grosnick,S. M. Guertin,K. S. F. F. Guimaraes,Y. Guo,N. Gupta,T. D. Gutierrez,B. Haag,T. J. Hallman,A. Hamed, J. W. Harris,M. Heinz,T. W. Henry, B. Hippolyte, A. Hirsch, E. Hjort,G. W. Hoffmann,M. J. Horner,H. Z. Huang,S. L. Huang, E. W. Hughes, T. J. Humanic, G. Igo, P. Jacobs,W. W. Jacobs,P. Jakl,F. Jia,H. Jiang, P. G. Jones,E. G. Judd, S. Kabana,K. Kang,J. Kapitan,M. Kaplan,D. Keane,A. Kechechyan,V. Yu,B. C. Kim,J. Kiryluk,A. Kisiel,E. M. Kislov, S. R. Klein,D. D. Koetke,T. Kollegger,M. Kopytine,L. Kotchenda,V. Kouchpil,K. L. Kowalik,M. Kramer,P. Kravtsov,V. I. Kravtsov, K. Krueger, C. Kuhn,A. I. Kulikov, A. Kumar,A. A. Kuznetsov,M. A. C. Lamont,J. M. Landgraf,S. Lange,S. LaPointe,F. Laue, J. Lauret,A. Lebedev, R. Lednicky,S. Lehocka,M. J. LeVine,C. Li, G. Lin,S. J. Lindenbaum, M. A. Lisa, F. Liu, H. Liu, J. Liu,L. Liu, Z. Liu,T. Ljubicic,W. J. Llope,R. S. Longacre,M. Lopez-Noriega,Y. Lu,T. Ludlam, D. Lynn,G. L. Ma,J. G. Ma,Y. G. Ma,D. Magestro,D. P. Mahapatra,R. Majka,L. K. Mangotra,R. Manweiler,S. Margetis, C. Markert,L. Martin,H. S. Matis,A. Matulenko, C. J. McClain,T. S. McShane, A. Meschanin,M. L. Miller,N. G. Minaev,S. Mioduszewski, C. Mironov, A. Mischke, D. K. Mishra,J. Mitchell, B. Mohanty,L. Molnar,C. F. Moore,D. A. Morozov, M. G. Munhoz,B. K. Nandi,C. Nattrass,T. K. Nayak,J. M. Nelson,P. K. Netrakanti,V. A. Nikitin,L. V. Nogach,S. B. Nurushev, G. Odyniec,A. Ogawa,V. Okorokov,M. Oldenburg, D. Olson,M. Pachr,S. K. Pal,Y. Panebratsev,S. Y. Panitkin,A. I. Pavlinov, T. Pawlak, T. Peitzmann,V. Perevoztchikov,C. Perkins, W. Peryt,V. A. Petrov,S. C. Phatak,R. Picha,M. Planinic, J. Pluta,N. Poljak,N. Porile,J. Porter, A. M. Poskanzer,M. Potekhin,E. Potrebenikova,D. Prindle,C. Pruneau,J. Putschke, R. Raniwala,S. Raniwala,R. L. Ray,S. V. Razin,J. Reinnarth,D. Relyea,F. Retiere,A. Ridiger,H. G. Ritter,J. B. Roberts,O. V. Rogachevskiy,J. L. Romero, A. Rose, C. Roy,B. Potukuchi, D. Prindle,C. Pruneau,J. Putschke, G. Rakness, R. Raniwala,S. Raniwala,R. Ray,S. Razin,J. Reinnarth,D. Relyea,F. Retiere,A. Ridiger,H. Ritter,J. Roberts,O. Rogachevskiy,J. Romero, A. Rose, C. Roy,L. Ruan,M. Russcher,R. Sahoo,I. Sakrejda, S. Salur,J. Sandweiss,M. Sarsour,P. Sazhin,J. Schambach,R. Scharenberg,N. Schmitz,K. Schweda,J. Seger,I. Selyuzhenkov,P. Seyboth,A. Shabetai,E. Shahaliev,M. Shao,M. Sharma,W. Shen,S. Shimanskiy,E Sichtermann,F. Simon,R. Singaraju, N. Smirnov,R. Snellings,G. Sood,P. Sorensen, J. Sowinski,J. Speltz,H. Spinka, B. Srivastava,A. Stadnik,T. Stanislaus,R. Stock,A. Stolpovsky,M. Strikhanov,B. Stringfellow,A. Suaide, E. Sugarbaker,M. Sumbera, Z. Sun,B. Surrow,M. Swanger,T. Symons,A. Szanto de Toledo,A. Tai,J. Takahashi,A. Tang,T. Tarnowsky,D. Thein,J. Thomas,A. Timmins,S. Timoshenko,M. Tokarev,S. Trentalange,R. Tribble,O. Tsai,J. Ulery,T. Ullrich,D. Underwood,G. Van Buren,N. van der Kolk,M. van Leeuwen,A. Vander Molen,R. Varma,I. Vasilevski,A. Vasiliev,R. Vernet,S. Vigdor,Y. Viyogi,S. Vokal,S. Voloshin,W. Waggoner, F. Wang, G. Wang, J. Wang,X. Wang,Y. Wang,J. Watson,J. Webb,G. Westfall,A. Wetzler,C. Whitten,H. Wieman,S. Wissink,R. Witt,J. Wood,J. Wu,N. Xu,Q. Xu,Z. Xu,P. Yepes,I. K. Yoo,V. Yurevich, W. Zhan,H. Zhang, W. Zhang,Y. Zhang,Z. Zhang,Y. Zhao, C. Zhong,R. Zoulkarneev,Y. Zoulkarneeva,A. Zubarev,J. Zuo

PHYSICAL REVIEW LETTERS（2006）

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摘要

The STAR Collaboration at the Relativistic Heavy Ion Collider reports measurements of azimuthal correlations of high transverse momentum (p(T)) charged hadrons in Au+Au collisions at higher p(T) than reported previously. As p(T) is increased, a narrow, back-to-back peak emerges above the decreasing background, providing a clear dijet signal for all collision centralities studied. Using these correlations, we perform a systematic study of dijet production and suppression in nuclear collisions, providing new constraints on the mechanisms underlying partonic energy loss in dense matter.

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