Observation of Direct-Photon Collective Flow inAu+AuCollisions atsNN=200 GeV

6533b854fe1ef96bd12ae879

RESEARCH PRODUCT

Observation of Direct-Photon Collective Flow inAu+AuCollisions atsNN=200 GeV

J. H. Kang J. P. Wood J. S. Haggerty Vladimir Samsonov H. Pei Alexander Milov Y. Fukao I. Nakagawa K. A. Drees M. Virius R. Luechtenborg T. Engelmore Frank Ellinghaus K. Watanabe Y. S. Lai T. Hester K. S. Joo Minghui Liu S. Afanasiev C. Baumann S. Kametani C. P. Singh B. M. Johnson J. L. Nagle H. Liu G. S. Kyle James Alexander R. Averbeck Byung-sik Hong E. R. Kinney A. Bazilevsky D. P. Morrison A. Rakotozafindrabe J. T. Mitchell Alexandre Lebedev Shinhong Kim D. M. Lee K. Kiriluk K. Kiriluk M. Heffner Kenneth Francis Read J. Newby G. Roche S. Campbell R. Seidl E. H. Kim C. H. Chen A. Isupov K. Das M. Naglis Y. Ikeda C. L. Silva E. J. Mannel Vladislav Manko M. Slunečka B. Meredith A. Glenn C. L. Woody A. Berdnikov K. Karatsu C. M. Camacho Prashant Shukla K. Shoji T. Horaguchi P. W. Stankus Ajit Kumar Mohanty T. A. Shibata T. Sato N. A. Sparks Marisilvia Donadelli V. Bumazhnov M. Gonin C. Pinkenburg S. Belikov John Hill Toru Sugitate Tadaaki Isobe S. P. Sorensen O. Chvala D. Hornback X. He Masayasu Ishihara S. Esumi E. P. Hartouni Tatsuya Chujo I. Ravinovich C. Silvestre Anne Marie Sickles S. F. Pate O. Drapier I. V. Sourikova T. L. Thomas J. Sziklai J. G. Lajoie Sung Keun Park Y. Aramaki V. Peresedov Robert Vertesi D. Sharma R. Ichimiya Charles Maguire P. L. Mcgaughey A. Taranenko Kazushi Miki Y. J. Kwon J. Koster B. Komkov P. Tarján Norio Saito M. A. L. Leite R. Belmont J. S. Kapustinsky V. Babintsev M. Bai H. Al-bataineh Maya Hachiya Shimomura Ryugo S. Hayano I. J. Choi A. Kravitz C. Vale K. B. Lee A. Yu. Semenov Y. Riabov Brian Cole H. Masui Kenta Shigaki Martin Purschke D. Kawall K. Tanida H. Themann R. Tanabe Brajesh K. Singh Christine Angela Aidala O. Dietzsch H. Valle T. Csörgő N. N. Ajitanand M. Nguyen Jen-chieh Peng Á. Kiss D. Isenhower A. Toia François Fleuret J. E. Frantz A. A. Bickley J. Murata Dipanwita Dutta A. S. Nyanin Rachid Nouicer K. N. Barish M. Proissl A. V. Kazantsev N. Grau T. Ichihara D. Roach K. M. Kijima F. Matathias Y. I. Makdisi Gerd Joachim Kunde I. Shein Rushan Han Takahiro Fusayasu Julia Velkovska Senta Greene E. Kistenev A. T. Basye Kensuke Homma E. Richardson Zhiying You R. Bennett G. R. Young A. Morreale Z. Fraenkel M. Rosati K. Sedgwick L. Tomášek M. I. Nagy E. J. Desmond B. Fadem E. O'brien R. A. Soltz M. Kawashima S. Tarafdar D. Kotchetkov Xingguo Li Inkyu Park P. Constantin A. Deshpande Alexander Malakhov K. I. Hahn B. Bassalleck M. Finger D. Silvermyr M. L. Brooks M. Togawa E. Vazquez-zambrano R. K. Choudhury Takahiro Nakamura L. S. Zolin V. S. Pantuev V. Papavassiliou Susumu Oda A. A. Vinogradov M. Ouchida M. Grosse Perdekamp M. E. Connors Jongmin Lee N. Means H. Pereira Johannes Peter Wessels Xiong Wang M. Konno A. Sukhanov B. Azmoun Y. J. Mao B. Love J. Park A. Král W. J. Park Christopher Rosen S. Yokkaichi J. Jin E. M. Takagui Jiangyong Jia Y. Goto Motoi Inaba R. M. Wright Eva Haslum B. Lenzi Y. Morino Y. Watanabe J. Hamblen A. Yanovich D. Lynch R. S. Towell A. G. Litvinenko Dong Jo Kim Peter Leth Christiansen I. Garishvili F. Wei I. Younus T. C. Awes Kyoichiro Ozawa T. Liška S. Sano A. Durum D. Winter D. Yu Peressounko Y. Nakamiya J. S. Bok M. J. Tannenbaum Kyeongpil Lee Mate Csanad M. Oka D. S. Jumper Y. Tsuchimoto I. E. Yushmanov A. Dion S. N. White J. Ide Beomkyu Kim K. Boyle Wei Xie A. Kozlov G. Baksay T. Dahms H. Qu R. Seto Alexei Khanzadeev Atsushi Taketani A. Enokizono K. Yamaura K. S. Sim P. Liebing K. Okada B. Sahlmueller H. En'yo S. Bathe S. Sawada C. Y. Chi Zvi Hirsh Citron Y. Tanaka I. Danchev E. Stenlund M. J. Leitch H. Torii A. Veicht J. Ying A. Franz Y. J. Kim Hideki Hamagaki K. Aoki G. David Agneta Oskarsson R. Yang K. Nakano W. E. Sondheim I. Tserruya D. E. Fields Yu. Efremenko K. Imai B. V. Jacak R. P. Pisani Y. Onuki D. Ivanischev T. V. Moukhanova L. Baksay M. Mccumber Jan Rak R. Lacey Y. Berdnikov R. Granier De Cassagnac V. Singh A. Adare J. Hanks P. A. Rukoyatkin Alice Mignerey D. Watanabe Taku Gunji H. Gong M. D. Malik J. Seele M. Wysocki E. Vznuzdaev Y. Akiba Takao Sakaguchi F. Kajihara C. Klein-boesing M. Mishra S. Nagamiya A. D. Frawley T. Kempel Dong-hun Kim S. Butsyk Vaclav Vrba Klaus Johannes Reygers S. Huang S. Zhou Rui Wei W. Holzmann S. D. Rolnick Eunja Kim M. Kurosawa P. Rosnet E. T. Atomssa P. Chung A. K. Purwar K. Fujiwara A. Datta H. A. Gustafsson Y. L. Yamaguchi C. Zhang E. Leitner P. Ružička H. W. Van Hecke Viktor Riabov W. A. Zajc V. Baublis A. Denisov V. Cianciolo Henner Buesching Steve Edwards Sergey Fokin Marcus Hohlmann L. A. Linden Levy P. Mikeš M. Chiu C. A. Ogilvie Kisung Lee T. K. Hemmick J. M. Durham Yasuo Miake L. Kochenda M. Issah R. Pak N. Kamihara Kazuyoshi Kurita A. Drees K. Sakashita Jason Kamin S. P. Stoll S. S.e. Rosendahl G. Bunce D. Jouan S. Dairaku

subject

Physics Particle physics Photon 010308 nuclear & particles physics Scattering Hadron Elliptic flow General Physics and Astronomy Parton 01 natural sciences Nuclear physics 0103 physical sciences High Energy Physics::Experiment PHENIX detector Nuclear Experiment 010306 general physics Anisotropy Relativistic Heavy Ion Collider

description

The second Fourier component v(2) of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (p(T)) of 1-12 GeV/c in Au + Au collisions at root s(NN) = 200 GeV. Previous measurements of this quantity for hadrons with p(T) 6 GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for p(T) > 4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering. However, in the p(T) < 4 GeV/c region dominated by thermal photons, we find a substantial direct-photon v(2) comparable to that of hadrons, whereas model calculations for thermal photons in this kinematic region underpredict the observed v(2).

year	journal	country	edition	language
2012-09-19	Physical Review Letters

https://doi.org/10.1103/physrevlett.109.122302