Enhanced Production Of Direct Photons In Au Plus Au Collisions At Root S(Nn)=200 Gev And Implications For The Initial Temperature

A. Adare, S. Afanasiev, C. Aidala,N. N. Ajitanand,Y. Akiba,H. Al-Bataineh,J. Alexander,A. Al-Jamel,K. Aoki, L. Aphecetche,R. Armendariz,S. H. Aronson,J. Asai,E. T. Atomssa,R. Averbeck, T. C. Awes,B. Azmoun,V. Babintsev,G. Baksay,L. Baksay, A. Baldisseri,K. N. Barish,P. D. Barnes,B. Bassalleck,S. Bathe,S. Batsouli,V. Baublis,F. Bauer,A. Bazilevsky,S. Belikov,R. Bennett,Y. Berdnikov,A. A. Bickley,M. T. Bjorndal,J. G. Boissevain,H. Borel,K. Boyle, M. L. Brooks, D. S. Brown,D. Bucher,H. Buesching,V. Bumazhnov,G. Bunce,J. M. Burward-Hoy,S. Butsyk,S. Campbell,J.-S. Chai,B. S. Chang,J.-L. Charvet,S. Chernichenko, J. Chiba,C. Y. Chi,M. Chiu,I. J. Choi, T. Chujo,P. Chung,A. Churyn,V. Cianciolo,C. R. Cleven,Y. Cobigo,B. A. Cole,M. P. Comets,P. Constantin,M. Csanád,T. Csörgő,T. Dahms,K. Das,G. David,M. B. Deaton,K. Dehmelt,H. Delagrange,A. Denisov,D. d’Enterria,A. Deshpande,E. J. Desmond,O. Dietzsch,A. Dion,M. Donadelli,J. L. Drachenberg,O. Drapier,A. Drees,A. K. Dubey,A. Durum,V. Dzhordzhadze,Y. V. Efremenko,J. Egdemir, F. Ellinghaus,W. S. Emam,A. Enokizono,H. En’yo,B. Espagnon, S. Esumi,K. O. Eyser,D. E. Fields,M. Finger,F. Fleuret,S. L. Fokin,B. Forestier, Z. Fraenkel,J. E. Frantz,A. Franz,A. D. Frawley,K. Fujiwara,Y. Fukao,S.-Y. Fung,T. Fusayasu,S. Gadrat,I. Garishvili,F. Gastineau,M. Germain,A. Glenn,H. Gong,M. Gonin,J. Gosset,Y. Goto,R. Granier de Cassagnac, N. Grau,S. V. Greene,M. Grosse Perdekamp,T. Gunji,H.-Å. Gustafsson,T. Hachiya,A. Hadj Henni,C. Haegemann,J. S. Haggerty,M. N. Hagiwara, H. Hamagaki, R. Han,H. Harada,E. P. Hartouni,K. Haruna,M. Harvey,E. Haslum,K. Hasuko,R. Hayano,M. Heffner,T. K. Hemmick,T. Hester,J. M. Heuser,X. He,H. Hiejima,J. C. Hill,R. Hobbs, M. Hohlmann,M. Holmes,W. Holzmann,K. Homma,B. Hong,T. Horaguchi,D. Hornback,M. G. Hur,T. Ichihara,K. Imai,M. Inaba,Y. Inoue,D. Isenhower,L. Isenhower,M. Ishihara,T. Isobe,M. Issah,A. Isupov,B. V. Jacak, J. Jia,J. Jin, O. Jinnouchi,B. M. Johnson,K. S. Joo,D. Jouan,F. Kajihara,S. Kametani,N. Kamihara,J. Kamin,M. Kaneta, J. H. Kang,H. Kanou,T. Kawagishi,D. Kawall,A. V. Kazantsev,S. Kelly,A. Khanzadeev,J. Kikuchi,D. H. Kim,D. J. Kim,E. Kim,Y.-S. Kim, E. Kinney,A. Kiss,E. Kistenev,A. Kiyomichi,J. Klay,C. Klein-Boesing,L. Kochenda,V. Kochetkov,B. Komkov,M. Konno,D. Kotchetkov, A. Kozlov,A. Král,A. Kravitz,P. J. Kroon,J. Kubart,G. J. Kunde,N. Kurihara,K. Kurita,M. J. Kweon,Y. Kwon,G. S. Kyle,R. Lacey,Y.-S. Lai,J. G. Lajoie, A. Lebedev,Y. Le Bornec,S. Leckey,D. M. Lee,M. K. Lee,T. Lee,M. J. Leitch, M. A. L. Leite, B. Lenzi,H. Lim,T. Liška,A. Litvinenko,M. X. Liu,X. Li,X. H. Li,B. Love,D. Lynch,C. F. Maguire,Y. I. Makdisi,A. Malakhov,M. D. Malik,V. I. Manko,Y. Mao,L. Mašek,H. Masui,F. Matathias,M. C. McCain,M. McCumber,P. L. McGaughey, Y. Miake,P. Mikeš,K. Miki,T. E. Miller,A. Milov,S. Mioduszewski,G. C. Mishra,M. Mishra,J. T. Mitchell,M. Mitrovski,A. Morreale,D. P. Morrison,J. M. Moss,T. V. Moukhanova,D. Mukhopadhyay,J. Murata,S. Nagamiya, Y. Nagata,J. L. Nagle,M. Naglis,I. Nakagawa,Y. Nakamiya,T. Nakamura,K. Nakano,J. Newby,M. Nguyen,B. E. Norman,A. S. Nyanin, J. Nystrand,E. O’Brien,S. X. Oda,C. A. Ogilvie,H. Ohnishi,I. D. Ojha,H. Okada,K. Okada,M. Oka,O. O. Omiwade, A. Oskarsson,I. Otterlund,M. Ouchida,K. Ozawa,R. Pak,D. Pal,A. P. T. Palounek,V. Pantuev, V. Papavassiliou,J. Park,W. J. Park,S. F. Pate,H. Pei,J.-C. Peng,H. Pereira,V. Peresedov,D. Yu. Peressounko,C. Pinkenburg,R. P. Pisani,M. L. Purschke,A. K. Purwar,H. Qu,J. Rak,A. Rakotozafindrabe,I. Ravinovich,K. F. Read,S. Rembeczki,M. Reuter,K. Reygers,V. Riabov,Y. Riabov, G. Roche,A. Romana,M. Rosati,S. S. E. Rosendahl, P. Rosnet,P. Rukoyatkin,V. L. Rykov,S. S. Ryu,B. Sahlmueller,N. Saito,T. Sakaguchi,S. Sakai,H. Sakata,V. Samsonov,H. D. Sato,S. Sato,S. Sawada,J. Seele,R. Seidl,V. Semenov, R. Seto,D. Sharma,T. K. Shea,I. Shein,A. Shevel,T.-A. Shibata,K. Shigaki,M. Shimomura,T. Shohjoh,K. Shoji,A. Sickles,C. L. Silva, D. Silvermyr,C. Silvestre,K. S. Sim,C. P. Singh,V. Singh,S. Skutnik,M. Slunečka,W. C. Smith,A. Soldatov,R. A. Soltz,W. E. Sondheim,S. P. Sorensen,I. V. Sourikova,F. Staley,P. W. Stankus, E. Stenlund,M. Stepanov,A. Ster,S. P. Stoll, T. Sugitate, C. Suire,J. P. Sullivan,J. Sziklai,T. Tabaru,S. Takagi,E. M. Takagui,A. Taketani,K. H. Tanaka,Y. Tanaka,K. Tanida,M. J. Tannenbaum,A. Taranenko,P. Tarján,T. L. Thomas,M. Togawa,A. Toia, J. Tojo,L. Tomášek,H. Torii,R. S. Towell,V. N. Tram,I. Tserruya,Y. Tsuchimoto,S. K. Tuli,H. Tydesjö, N. Tyurin,C. Vale,H. Valle,H. W. van Hecke, J. Velkovska,R. Vertesi,A. A. Vinogradov,M. Virius, V. Vrba,E. Vznuzdaev,M. Wagner,D. Walker,X. R. Wang,Y. Watanabe,J. Wessels,S. N. White,N. Willis,D. Winter,C. L. Woody,M. Wysocki, W. Xie,Y. L. Yamaguchi,A. Yanovich,Z. Yasin,J. Ying,S. Yokkaichi, G. R. Young,I. Younus,I. E. Yushmanov,W. A. Zajc,O. Zaudtke,C. Zhang,S. Zhou,J. Zimányi,L. Zolin

PHYSICAL REVIEW LETTERS（2010）

引用 385|浏览162

暂无评分

摘要

The production of e(+)e(-) pairs for m(e+e-) < 0.3 GeV/c(2) and 1< p(T) < 5 GeV/c is measured in p + p and Au + Au collisions at root s(NN) = 200 GeV. An enhanced yield above hadronic sources is observed. Treating the excess as photon internal conversions, the invariant yield of direct photons is deduced. In central Au + Au collisions, the excess of the direct photon yield over p + p is exponential in transverse momentum, with an inverse slope T = 221 +/- 19(stat) +/- 19(syst) MeV. Hydrodynamical models with initial temperatures ranging from T-init similar to 300-600 MeV at times of similar to 0.6-0.15 fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at similar to 170 MeV.

查看译文

关键词

hydrodynamics,gold,natural sciences

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要