首页|Azimuthal anisotropy of direct photons in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

Azimuthal anisotropy of direct photons in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

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英文摘要

The PHENIX experiment at the Relativistic Heavy Ion Collider measured the second Fourier component $v_2$ of the direct-photon azimuthal anisotropy at midrapidity in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The results are presented in 10\% wide bins of collision centrality and cover the transverse-momentum range of $1<p_T<20$ GeV/$c$, and are in quantitative agreement with findings published earlier, but provide better granularity and higher $p_T$ reach. Above a $p_T$ of 8--10 GeV/$c$, where hard scattering dominates the direct-photon production, $v_2$ is consistent with zero. Below that in each centrality bin $v_2$ as a function of $p_T$ is comparable to the $\pi^0$ anisotropy albeit with a tendency of being somewhat smaller. The results are compared to recent theory calculations that include, in addition to thermal radiation from the quark-gluon plasma and hadron gas, sources of photons from pre-equilibrium, strong magnetic fields, or radiative hadronization. While the newer theoretical calculations describe the data better than previous models, none of them alone can fully explain the results, particularly in the region of $p_T=4$--8 GeV/$c$.

作者：Z. Ji、S. Zhou、L. Zou、B. M. Johnson、D. Jouan、D. S. Jumper、S. Kanda、J. H. Kang、G. Kasza、W. A. Zajc、A. Zelenski、D. Isenhower、D. Ivanishchev、B. V. Jacak、M. Jezghani、X. Jiang、R. S. Hollis、K. Homma、B. Hong、T. Hoshino、N. Hotvedt、J. Huang、K. Imai、M. Inaba、K. Hashimoto、T. K. Hemmick、X. He、J. C. Hill、A. Iordanova、H. Yu、H. W. van Hecke、J. Velkovska、M. Virius、V. Vrba、X. R. Wang、Z. Wang、Y. Watanabe、Y. S. Watanabe、F. Wei、A. S. White、C. L. Woody、M. Wysocki、B. Xia、L. Xue、S. Yalcin、Y. L. Yamaguchi、A. Yanovich、I. Yoon、J. H. Yoo、I. E. Yushmanov、I. Shein、T. -A. Shibata、K. Shigaki、M. Shimomura、P. Shukla、A. Sickles、C. L. Silva、D. Silvermyr、B. K. Singh、C. P. Singh、V. Singh、M. Slune?ka、K. L. Smith、M. Snowball、R. A. Soltz、W. E. Sondheim、S. P. Sorensen、I. V. Sourikova、P. W. Stankus、M. Stepanov、S. P. Stoll、T. Sugitate、A. Sukhanov、T. Sumita、J. Sun、Z. Sun、J. Sziklai、A. Taketani、K. Tanida、M. J. Tannenbaum、S. Tarafdar、A. Taranenko、R. Tieulent、A. Timilsina、T. Todoroki、M. Tomá?ek、C. L. Towell、R. Towell、R. S. Towell、I. Tserruya、B. Ujvari、D. Kawall、J. Perry、R. Petti、C. Pinkenburg、R. Pinson、R. P. Pisani、M. Potekhin、M. L. Purschke、J. Rak、B. J. Ramson、I. Ravinovich、K. F. Read、D. Reynolds、V. Riabov、Y. Riabov、D. Richford、T. Rinn、S. D. Rolnick、M. Rosati、Z. Rowan、J. G. Rubin、B. Sahlmueller、N. Saito、T. Sakaguchi、H. Sako、V. Samsonov、M. Sarsour、S. Sato、B. Schaefer、B. K. Schmoll、K. Sedgwick、R. Seidl、A. Seleznev、A. Sen、R. Seto、P. Sett、A. Sexton、D. Sharma、M. L. Brooks、J. Bryslawskyj、V. Bumazhnov、S. Campbell、C. -H. Chen、D. Chen、M. Chiu、C. Y. Chi、I. J. Choi、J. B. Choi、T. Chujo、Z. Citron、M. Connors、R. Corliss、M. Csanád、T. Cs?rg?、T. W. Danley、A. Datta、M. S. Daugherity、G. David、K. DeBlasio、K. Dehmelt、A. Denisov、A. Deshpande、E. J. Desmond、A. Dion、P. B. Diss、V. Doomra、J. H. Do、A. Drees、K. A. Drees、J. M. Durham、A. Durum、A. Enokizono、R. Esha、B. Fadem、W. Fan、N. Feege、D. E. Fields、M. Finger,、M. Finger、D. Firak、D. Fitzgerald、S. L. Fokin、J. E. Frantz、A. Franz、A. D. Frawley、P. Gallus、C. Gal、P. Garg、H. Ge、M. Giles、F. Giordano、A. Glenn、Y. Goto、N. Grau、S. V. Greene、M. Grosse Perdekamp、T. Gunji、T. Guo、T. Hachiya、J. S. Haggerty、K. I. Hahn、H. Hamagaki、H. F. Hamilton、J. Hanks、S. Y. Han、S. Hasegawa、T. O. S. Haseler、A. Hodges、A. V. Kazantsev、J. A. Key、V. Khachatryan、A. Khanzadeev、B. Kimelman、C. Kim、D. J. Kim、E. -J. Kim、G. W. Kim、M. Kim、E. Kistenev、R. Kitamura、J. Klatsky、D. Kleinjan、P. Kline、T. Koblesky、B. Komkov、D. Kotov、L. Kovacs、K. Kurita、A. K. Mohanty、P. Montuenga、T. Moon、D. P. Morrison、T. V. Moukhanova、B. Mulilo、T. Murakami、J. Murata、A. Mwai、K. Nagashima、J. L. Nagle、M. I. Nagy、I. Nakagawa、H. Nakagomi、K. Nakano、C. Nattrass、P. K. Netrakanti、T. Niida、S. Nishimura、R. Nouicer、N. Novitzky、T. Novák、G. Nukazuka、A. S. Nyanin、E. O'Brien、C. A. Ogilvie、J. D. Orjuela Koop、M. Orosz、J. D. Osborn、A. Oskarsson、K. Ozawa、R. Pak、V. Pantuev、V. Papavassiliou、J. S. Park、S. Park、M. Patel、S. F. Pate、J. -C. Peng、D. V. Perepelitsa、G. D. N. Perera、D. Yu. Peressounko、PHENIX Collaboration、N. J. Abdulameer、U. Acharya、A. Adare、C. Aidala、N. N. Ajitanand、Y. Akiba、M. Alfred、S. Antsupov、N. Apadula、H. Asano、B. Azmoun、V. Babintsev、M. Bai、N. S. Bandara、B. Bannier、E. Bannikov、K. N. Barish、S. Bathe、A. Bazilevsky、M. Beaumier、S. Beckman、R. Belmont、A. Berdnikov、Y. Berdnikov、L. Bichon、B. Blankenship、D. S. Blau、J. S. Bok、V. Borisov、K. Boyle、D. Larionova、A. Lebedev、S. Lee、S. H. Lee、M. J. Leitch、S. H. Lim、M. X. Liu、X. Li、X. Li、D. A. Loomis、D. Lynch、S. L?k?s、Y. I. Makdisi、M. Makek、A. Manion、V. I. Manko、E. Mannel、M. McCumber、P. L. McGaughey、D. McGlinchey、C. McKinney、A. Meles、M. Mendoza、A. C. Mignerey、A. Milov、D. K. Mishra、J. T. Mitchell、M. Mitrankova、Iu. Mitrankov、S. Miyasaka、S. Mizuno、M. Kurosawa、Y. Kwon、J. G. Lajoie

作者单位：

学科分类：粒子探测技术、辐射探测技术、核仪器仪表

推荐引用：Z. Ji,S. Zhou,L. Zou,B. M. Johnson,D. Jouan,D. S. Jumper,S. Kanda,J. H. Kang,G. Kasza,W. A. Zajc,A. Zelenski,D. Isenhower,D. Ivanishchev,B. V. Jacak,M. Jezghani,X. Jiang,R. S. Hollis,K. Homma,B. Hong,T. Hoshino,N. Hotvedt,J. Huang,K. Imai,M. Inaba,K. Hashimoto,T. K. Hemmick,X. He,J. C. Hill,A. Iordanova,H. Yu,H. W. van Hecke,J. Velkovska,M. Virius,V. Vrba,X. R. Wang,Z. Wang,Y. Watanabe,Y. S. Watanabe,F. Wei,A. S. White,C. L. Woody,M. Wysocki,B. Xia,L. Xue,S. Yalcin,Y. L. Yamaguchi,A. Yanovich,I. Yoon,J. H. Yoo,I. E. Yushmanov,I. Shein,T. -A. Shibata,K. Shigaki,M. Shimomura,P. Shukla,A. Sickles,C. L. Silva,D. Silvermyr,B. K. Singh,C. P. Singh,V. Singh,M. Slune?ka,K. L. Smith,M. Snowball,R. A. Soltz,W. E. Sondheim,S. P. Sorensen,I. V. Sourikova,P. W. Stankus,M. Stepanov,S. P. Stoll,T. Sugitate,A. Sukhanov,T. Sumita,J. Sun,Z. Sun,J. Sziklai,A. Taketani,K. Tanida,M. J. Tannenbaum,S. Tarafdar,A. Taranenko,R. Tieulent,A. Timilsina,T. Todoroki,M. Tomá?ek,C. L. Towell,R. Towell,R. S. Towell,I. Tserruya,B. Ujvari,D. Kawall,J. Perry,R. Petti,C. Pinkenburg,R. Pinson,R. P. Pisani,M. Potekhin,M. L. Purschke,J. Rak,B. J. Ramson,I. Ravinovich,K. F. Read,D. Reynolds,V. Riabov,Y. Riabov,D. Richford,T. Rinn,S. D. Rolnick,M. Rosati,Z. Rowan,J. G. Rubin,B. Sahlmueller,N. Saito,T. Sakaguchi,H. Sako,V. Samsonov,M. Sarsour,S. Sato,B. Schaefer,B. K. Schmoll,K. Sedgwick,R. Seidl,A. Seleznev,A. Sen,R. Seto,P. Sett,A. Sexton,D. Sharma,M. L. Brooks,J. Bryslawskyj,V. Bumazhnov,S. Campbell,C. -H. Chen,D. Chen,M. Chiu,C. Y. Chi,I. J. Choi,J. B. Choi,T. Chujo,Z. Citron,M. Connors,R. Corliss,M. Csanád,T. Cs?rg?,T. W. Danley,A. Datta,M. S. Daugherity,G. David,K. DeBlasio,K. Dehmelt,A. Denisov,A. Deshpande,E. J. Desmond,A. Dion,P. B. Diss,V. Doomra,J. H. Do,A. Drees,K. A. Drees,J. M. Durham,A. Durum,A. Enokizono,R. Esha,B. Fadem,W. Fan,N. Feege,D. E. Fields,M. Finger,,M. Finger,D. Firak,D. Fitzgerald,S. L. Fokin,J. E. Frantz,A. Franz,A. D. Frawley,P. Gallus,C. Gal,P. Garg,H. Ge,M. Giles,F. Giordano,A. Glenn,Y. Goto,N. Grau,S. V. Greene,M. Grosse Perdekamp,T. Gunji,T. Guo,T. Hachiya,J. S. Haggerty,K. I. Hahn,H. Hamagaki,H. F. Hamilton,J. Hanks,S. Y. Han,S. Hasegawa,T. O. S. Haseler,A. Hodges,A. V. Kazantsev,J. A. Key,V. Khachatryan,A. Khanzadeev,B. Kimelman,C. Kim,D. J. Kim,E. -J. Kim,G. W. Kim,M. Kim,E. Kistenev,R. Kitamura,J. Klatsky,D. Kleinjan,P. Kline,T. Koblesky,B. Komkov,D. Kotov,L. Kovacs,K. Kurita,A. K. Mohanty,P. Montuenga,T. Moon,D. P. Morrison,T. V. Moukhanova,B. Mulilo,T. Murakami,J. Murata,A. Mwai,K. Nagashima,J. L. Nagle,M. I. Nagy,I. Nakagawa,H. Nakagomi,K. Nakano,C. Nattrass,P. K. Netrakanti,T. Niida,S. Nishimura,R. Nouicer,N. Novitzky,T. Novák,G. Nukazuka,A. S. Nyanin,E. O'Brien,C. A. Ogilvie,J. D. Orjuela Koop,M. Orosz,J. D. Osborn,A. Oskarsson,K. Ozawa,R. Pak,V. Pantuev,V. Papavassiliou,J. S. Park,S. Park,M. Patel,S. F. Pate,J. -C. Peng,D. V. Perepelitsa,G. D. N. Perera,D. Yu. Peressounko,PHENIX Collaboration,N. J. Abdulameer,U. Acharya,A. Adare,C. Aidala,N. N. Ajitanand,Y. Akiba,M. Alfred,S. Antsupov,N. Apadula,H. Asano,B. Azmoun,V. Babintsev,M. Bai,N. S. Bandara,B. Bannier,E. Bannikov,K. N. Barish,S. Bathe,A. Bazilevsky,M. Beaumier,S. Beckman,R. Belmont,A. Berdnikov,Y. Berdnikov,L. Bichon,B. Blankenship,D. S. Blau,J. S. Bok,V. Borisov,K. Boyle,D. Larionova,A. Lebedev,S. Lee,S. H. Lee,M. J. Leitch,S. H. Lim,M. X. Liu,X. Li,X. Li,D. A. Loomis,D. Lynch,S. L?k?s,Y. I. Makdisi,M. Makek,A. Manion,V. I. Manko,E. Mannel,M. McCumber,P. L. McGaughey,D. McGlinchey,C. McKinney,A. Meles,M. Mendoza,A. C. Mignerey,A. Milov,D. K. Mishra,J. T. Mitchell,M. Mitrankova,Iu. Mitrankov,S. Miyasaka,S. Mizuno,M. Kurosawa,Y. Kwon,J. G. Lajoie.Azimuthal anisotropy of direct photons in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV[EB/OL].(2025-04-03)[2025-05-16].https://arxiv.org/abs/2504.02955.点此复制

Azimuthal anisotropy of direct photons in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

Azimuthal anisotropy of direct photons in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

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