Identified Baryon And Meson Distributions At Large Transverse Momenta From Au Plus Au Collisions At Root(S)(Nn)=200 Gev

B. I. Abelev, M. M. Aggarwal, Z. Ahammed,B. D. Anderson,M. Anderson,D. Arkhipkin,G. S. Averichev, Y. Bai,J. Balewski, L. S. Barnby,J. Baudot,S. Bekele,V. V. Belaga,A. Bellingeri-Laurikainen, R. Bellwied,F. Benedosso,S. Bhardwaj,A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova,L. C. Bland,B. E. Bonner, M. Botje,J. Bouchet,A. V. Brandin,A. Bravar, T. P. Burton,M. Bystersky,R. V. Cadman,X. Z. Cai, H. Caines,J. Castillo,O. Catu, D. Cebra,Z. Chajecki,P. Chaloupka,S. Chattopadhyay,H. F. Chen, J. H. Chen,J. Cheng,M. Cherney, A. Chikanian,W. Christie,J. P. Coffin, T. M. Cormier,M. R. Cosentino, J. G. Cramer,H. J. Crawford,S. Dash,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,P. Fachini,R. Fatemi,J. Fedorisin,P. Filip,E. Finch,Y. Fisyak,J. Fu,C. A. Gagliardi,L. Gaillard,M. S. Ganti,V. Ghazikhanian,P. Ghosh,J. E. Gonzalez,Y. G. Gorbunov,H. Gos,D. Grosnick,S. M. Guertin,K. S. F. F. Guimaraes,N. Gupta,T. D. Gutierrez,B. Haag,T. J. Hallman,A. Hamed, J. W. Harris,M. Heinz,T. W. Henry,S. Hepplemann, B. Hippolyte, A. Hirsch, E. Hjort, A. M. Hoffman,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,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,A. Kocoloski,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,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,T. Ljubicic,W. Llope,H. Long,R. Longacre,W. Love,Y. Lu,T. Ludlam, D. Lynn,G. Ma,J. Ma,Y. Ma,D. Magestro,D. Mahapatra,R. Majka,L. Mangotra,R. Manweiler,S. Margetis, C. Markert,L. Martin,H. Matis,Yu. Matulenko,C. McClain, T. McShane,Yu. Melnick, A. Meschanin,J. Millane,M. Miller,N. Minaev,S. Mioduszewski, C. Mironov, A. Mischke,D. Mishra,J. Mitchell, B. Mohanty,L. Molnar,C. Moore,D. Morozov,M. Munhoz,B. Nandi,C. Nattrass,T. Nayak,J. Nelson,N. Nepali,P. Netrakanti,L. Nogach,S. Nurushev, G. Odyniec,A. Ogawa,V. Okorokov,M. Oldenburg, D. Olson,M. Pachr,S. Pal,Y. Panebratsev, S. Panitkin,A. Pavlinov,T. Pawlak, T. Peitzmann,V. Perevoztchikov,C. Perkins, W. Peryt,S. Phatak,R. Picha,M. Planinic,J. Pluta,N. Poljak,N. Porile,J. Porter,A. Poskanzer,M. Potekhin,E. Potrebenikova,B. Potukuchi,D. Prindle, C. Pruneau, J. Putschke, G. Rakness, R. Raniwala, S. Raniwala,R. Ray,S. Razin,J. Reinnarth,D. Relyea,A. Ridiger,H. Ritter,J. Roberts,O. Rogachevskiy, J. Romero, A. Rose, C. Roy,L. Ruan,M. Russcher,R. Sahoo, T. Sakuma, S. Salur,J. Sandweiss,M. Sarsour,P. Sazhin,J. Schambach,R. Scharenberg,N. Schmitz,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,N. Subba, 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,T. Trainor,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

Transverse momentum spectra of pi(+/-), p, and (p) over bar p up to 12 GeV/c at midrapidity in centrality selected Au + Au collisions at root s(NN) = 200 GeV are presented. In central Au + Au collisions, both pi(+/-) and p((p) over bar) show significant suppression with respect to binary scaling at p(T) greater than or similar to 4 GeV/c. Protons and antiprotons are less suppressed than pi(+/-), in the range 1.5 less than or similar to p(T) less than or similar to 6 GeV/c. The pi(-)/pi(+) and (p) over bar /p ratios show at most a weak pT dependence and no significant centrality dependence. The p/pi ratios in central Au + Au collisions approach the values in p + p and d + Au collisions at p(T) greater than or similar to 5 GeV/c. The results at high p(T) indicate that the partonic sources of pi(+/-), p, and (p) over bar have similar energy loss when traversing the nuclear medium.

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