Rho(0) Photoproduction In Auau Collisions At Root S(Nn)=62.4 Gev Measured With The Star Detector
G. Agakishiev,M. M. Aggarwal,Z. Ahammed,A. V. Alakhverdyants,I. Alekseev,J. Alford,B. D. Anderson,C. D. Anson,D. Arkhipkin,G. S. Averichev,J. Balewski,D. R. Beavis,N. K. Behera,R. Bellwied,M. J. Betancourt,R. R. Betts,A. Bhasin,A. K. Bhati,H. Bichsel,J. Bielcik,J. Bielcikova,L. C. Bland,I. G. Bordyuzhin,W. Borowski,J. Bouchet,E. Braidot,A. V. Brandin,A. Bridgeman,S. G. Brovko,E. Bruna,S. Bueltmann,I. Bunzarov,T. P. Burton,X. Z. Cai,H. Caines,M. Calderon De La Barca Sanchez,D. Cebra,R. Cendejas,M. C. Cervantes,P. Chaloupka,S. Chattopadhyay,H. F. Chen,J. H. Chen,J. Y. Chen,L. Chen,J. Cheng,M. Cherney,A. Chikanian,K. E. Choi,W. Christie,P. Chung,M. J. M. Codrington,R. Corliss,J. G. Cramer,H. J. Crawford,A. Davila Leyva,L. C. De Silva,R. R. Debbe,T. G. Dedovich,J. Deng,A. A. Derevschikov,R. Derradi De Souza,L. Didenko,P. Djawotho,S. M. Dogra,X. Dong,J. L. Drachenberg,J. E. Draper,C. M. Du,J. C. Dunlop,L. G. Efimov,M. Elnimr,J. Engelage,G. Eppley,M. Estienne,L. Eun,O. Evdokimov,R. Fatemi,J. Fedorisin,R. G. Fersch,P. Filip,E. Finch,V. Fine,Y. Fisyak,C. A. Gagliardi,F. Geurts,P. Ghosh,Y. N. Gorbunov,A. Gordon,O. G. Grebenyuk,D. Grosnick,A. Gupta,S. Gupta,W. Guryn,B. Haag,O. Hajkova,A. Hamed,L-X Han,J. W. Harris,J. P. Hays-Wehle,M. Heinz,S. Heppelmann,A. Hirsch,E. Hjort,G. W. Hoffmann,D. J. Hofman,B. Huang,H. Z. Huang,T. J. Humanic,L. Huo,G. Igo,P. Jacobs,W. W. Jacobs,C. Jena,F. Jin,J. Joseph,E. G. Judd,S. Kabana,K. Kang,J. Kapitan,K. Kauder,H. W. Ke,D. Keane,A. Kechechyan,D. Kettler,D. P. Kikola,J. Kiryluk,A. Kisiel,V. Kizka,S. R. Klein,A. G. Knospe,D. D. Koetke,T. Kollegger,J. Konzer,I. Koralt,L. Koroleva,W. Korsch,L. Kotchenda,V. Kouchpil,P. Kravtsov,K. Krueger,M. Krus,L. Kumar,M. A. C. Lamont,J. M. Landgraf,S. Lapointe,J. Lauret,A. Lebedev,R. Lednicky,J. H. Lee,W. Leight,M. J. Levine,C. Li,L. Li,N. Li,W. Li,X. Li,X. Li,Y. Li,Z. M. Li,L. M. Lima,M. A. Lisa,F. Liu,H. Liu,J. Liu,T. Ljubicic,W. J. Llope,R. S. Longacre,Y. Lu,E. V. Lukashov,X. Luo,G. L. Ma,Y. G. Ma,D. P. Mahapatra,R. Majka,O. I. Mall,R. Manweiler,S. Margetis,C. Markert,H. Masui,H. S. Matis,D. Mcdonald,T. S. Mcshane,A. Meschanin,R. Milner,N. G. Minaev,S. Mioduszewski,M. K. Mitrovski,Y. Mohammed,B. Mohanty,M. M. Mondal,B. Morozov,D. A. Morozov,M. G. Munhoz,M. K. Mustafa,M. Naglis,B. K. Nandi,T. K. Nayak,L. V. Nogach,S. B. Nurushev,G. Odyniec,A. Ogawa,K. Oh,A. Ohlson,V. Okorokov,E. W. Oldag,R. A. N. Oliveira,D. Olson,M. Pachr,B. S. Page,S. K. Pal,Y. Pandit,Y. Panebratsev,T. Pawlak,H. Pei,T. Peitzmann,C. Perkins,W. Peryt,P. Pile,M. Planinic,M. A. Ploskon,J. Pluta,D. Plyku,N. Poljak,J. Porter,A. M. Poskanzer,B. V. K. S. Potukuchi,C. B. Powell,D. Prindle,C. Pruneau,N. K. Pruthi,P. R. Pujahari,J. Putschke,H. Qiu,R. Raniwala,S. Raniwala,R. L. Ray,R. Redwine,R. Reed,H. G. Ritter,J. B. Roberts,O. V. Rogachevskiy,J. L. Romero,L. Ruan,J. Rusnak,N. R. Sahoo,I. Sakrejda,S. Salur,J. Sandweiss,E. Sangaline,A. Sarkar,J. Schambach,R. P. Scharenberg,J. Schaub,A. M. Schmah,N. Schmitz,T. R. Schuster,J. Seele,J. Seger,I. Selyuzhenkov,P. Seyboth,N. Shah,E. Shahaliev,M. Shao,M. Sharma,S. S. Shi,Q. Y. Shou,E. P. Sichtermann,F. Simon,R. N. Singaraju,M. J. Skoby,N. Smirnov,D. Solanki,P. Sorensen,U. G. Desouza,H. M. Spinka,B. Srivastava,T. D. S. Stanislaus,S. G. Steadman,J. R. Stevens,R. Stock,M. Strikhanov,B. Stringfellow,A. A. P. Suaide,M. C. Suarez,N. L. Subba,M. Sumbera,X. M. Sun,Y. Sun,Z. Sun,B. Surrow,D. N. Svirida,T. J. M. Symons,A. Szanto De Toledo,J. Takahashi,A. H. Tang,Z. Tang,L. H. Tarini,T. Tarnowsky,D. Thein,J. H. Thomas,J. Tian,A. R. Timmins,D. Tlusty,M. Tokarev,T. A. Trainor,S. Trentalange,R. E. Tribble,P. Tribedy,B. A. Trzeciak,O. D. Tsai,T. Ullrich,D. G. Underwood,G. Van Buren,G. Van Nieuwenhuizen,J. A. Vanfossen,R. Varma,G. M. S. Vasconcelos,A. N. Vasiliev,F. Videbaek,Y. P. Viyogi,S. Vokal,S. A. Voloshin,M. Wada,M. Walker,F. Wang,G. Wang,H. Wang,J. S. Wang,Q. Wang,X. L. Wang,Y. Wang,G. Webb,J. C. Webb,G. D. Westfall,C. Whitten,H. Wieman,S. W. Wissink,R. Witt,W. Witzke,Y. F. Wu,Z. Xiao,W. Xie,H. Xu,N. Xu,Q. H. Xu,W. Xu,Y. Xu,Z. Xu,L. Xue,Y. Yang,Y. Yang,P. Yepes,K. Yip,I-K. Yoo,M. Zawisza,H. Zbroszczyk,W. Zhan,J. B. Zhang,S. Zhang,W. M. Zhang,X. P. Zhang,Y. Zhang,Z. P. Zhang,F. Zhao,J. Zhao,C. Zhong,X. Zhu,Y. H. Zhu,Y. Zoulkarneeva
PHYSICAL REVIEW C（2012）
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摘要
Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent rho(0) photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent rho(0) photoproduction with nuclear breakup is 10.5 +/- 1.5 +/- 1.6mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.4 +/- 0.6, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed 15% +/- 55% increase between 130 GeV and 200 GeV.
