Dielectron production in Au + Au collisions atsNN=200GeV

6533b85ffe1ef96bd12c197a

RESEARCH PRODUCT

Dielectron production in Au + Au collisions atsNN=200GeV

D. Kawall H. Themann Atsushi Takahara J. Murata A. Meles Shunji Nishimura I. Ravinovich K. A. Drees Marisilvia Donadelli V. Bumazhnov Gerd Joachim Kunde Y. J. Kwon D. E. Fields M. Rosati Tamás Csörgő M. Bai Kenichi Imai T. O. S. Haseler Jiangyong Jia Y. Goto B. V. Jacak I. Shein D. Kleinjan E. C. Aschenauer P. B. Diss Min Soo Kim O. Dietzsch S. Wolin S. Bathe J. Klatsky C. Gal K. Sedgwick Hideki Hamagaki K. Aoki M. Vargyas G. David Julia Velkovska K. I. Hahn Mihael Makek A. Deshpande Kei Nagashima Alice Mignerey Kensuke Homma G. W. Kim P. Sett H. Pei L. D'orazio S. Miyasaka Y. Fukao J. D. Osborn Inseok Yoon J. Imrek Zhiying You K. Watanabe Dmitry Blau H. Qu J. S. Kang Raphael Noel Tieulent M. Kurosawa E. Richardson X. Jiang Susumu Sato S. Tarafdar K. Shoji E. J. Desmond R. A. Soltz M. Finger S. Dairaku Sung Keun Park Y. Watanabe S. Kanda Takao Sakaguchi A. Sen Takafumi Niida J. Huang E. Vazquez-zambrano P. W. Stankus Bum-hoon Lee A. Nederlof T. Hester N. N. Ajitanand Ajit Kumar Mohanty T. A. Shibata B. Lewis B. Azmoun I. Younus S. Hasegawa B. Bassalleck H. J. Kim J. Hanks A. D. Frawley A. Král N. S. Bandara Byoungchoo Park M. Kasai Hiroyuki Sako Y. Komatsu G. D. N. Perera Prakhar Garg M. Virius E. T. Atomssa I. Tserruya Takahiro Nakamura Vladimir Samsonov M. Grosse Perdekamp Hai Yu M. Jezghani Yu. Efremenko V. S. Pantuev M. Sano A. S. White M. Tomášek G. S. Kyle A. Drees D. Mcglinchey Christine Nattrass B. Bannier T. Todoroki F. Giordano M. E. Connors I. E. Yushmanov James Alexander J. D. Orjuela Koop D. Isenhower T. Moon T. Murakami V. Singh S. Huang E. M. Takagui M. Leitgab R. Averbeck L. Guo Alexei Khanzadeev Shinichi Masumoto C. H. Chen Byung-sik Hong A. Bazilevsky S. K. Park A. Durum K. S. Sim Soumya Mohapatra A. Manion P. Montuenga H. F. Hamilton Y. Nakamiya D. Lynch Maya Hachiya Shimomura R. S. Hollis T. Koblesky M. S. Daugherity C. P. Singh Motoi Inaba E. Stenlund Y. Tsuchimoto H. Nakagomi T. Hoshino N. Grau J. B. Choi Dipak Kumar Mishra P. Kline K. S. Lee Alexandre Lebedev Jong-min Park Taku Gunji Tomofumi Nagae J. L. Nagle B. M. Johnson Jongmin Lee A. Dion Y. I. Makdisi S. Sawada Charles Maguire K. Okada F. Wei Filip Krizek M. Sarsour Mate Csanad A. Iordanova A. Kiss S. Y. Han D. M. Lee P. Castera M. Patel S. Choi J. Ying A. Franz R. J. Petti R. Yang D. Kotov T. Kempel S. Kaneti P. L. Mcgaughey Peter Christiansen A. Enokizono M. Nihashi A. Datta B. Komkov S. Taneja N. Novitzky Henner Buesching A. Taketani M. J. Leitch A. Sukhanov M. I. Nagy K. Kurita J. H. Do R. S. Towell Prashant Shukla A. Glenn C. L. Towell Kiyoshi Tanida S. Zhou M. J. Tannenbaum J. Sziklai Martin Purschke C. A. Aidala D. Winter R. P. Pisani Eunja Kim D. S. Jumper E. Kistenev T. V. Moukhanova D. Yu Peressounko Norio Saito Tsutomu Mibe M. A. L. Leite Jason Kamin Brian Cole M. Mccumber S. F. Pate Ke. Nakamura H. Torii O. Drapier Jen-chieh Peng J. G. Rubin S. D. Rolnick B. K. Schmoll B. Sahlmueller R. S. Towell S. Beckman Y. J. Kim S. H. Lim I. Garishvili J. E. Frantz J. A. Key Pawan Kumar Netrakanti S. Butsyk Jaehyeok Yoo E. Tennant S. P. Stoll C. O. Kim D. Reynolds J. T. Mitchell K. Karatsu S. Motschwiller R. Pak R. Belmont J. S. Kapustinsky N. Hotvedt R. Seidl V. Babintsev S. Edwards A. V. Kazantsev J. Sun Inkyu Park Xiong Wang D. Ivanishchev X. Gong V. Papavassiliou Vladislav Manko M. Slunečka Y. Hori Anne Marie Sickles K. Gainey Dong Jo Kim B. Schaefer T. Sumita C. Y. Chi V. Khachatryan D. Kotchetkov S. P. Sorensen R. K. Choudhury M. Beaumier Hiromi Iinuma C. L. Silva Y. Tanaka L. Tomášek E. Mannel Senta Greene K. S. Joo M. Wysocki C. Vale R. Kitamura A. Timilsina M. Javani D. Watanabe Alexander Milov O. Chvala T. Novák B. Fadem E. O'brien D. Jouan H. J. Moon N. Apadula I. Nakagawa Young-ki Kim T. Engelmore L. A. Linden Levy A. Vossen Jan Rak R. Lacey E. Vznuzdaev R. Granier De Cassagnac A. Adare L. Patel E. R. Kinney D. P. Morrison S. Campbell J. G. Lajoie S. Esumi M. Alfred T. Hachiya M. Chiu T. C. Awes D. Sharma Kyoichiro Ozawa B. H. Kang S. Lee Jennifer E. Perry J. S. Bok H. Al-ta'ani C. A. Ogilvie Tatsuya Chujo L. Zou S. Baumgart K. B. Lee T. K. Hemmick B. J. Ramson J. M. Durham Y. Miyachi J. Bryslawskyj Yasuo Miake K. O. Eyser Minghui Liu Beomkyu Kim K. Deblasio L. Ding Kenneth Francis Read M. Issah T. Ichihara D. Roach R. Pinson M. Snowball K. M. Kijima B. Kimelman I. J. Choi K. Hashimoto B. Xia Xingguo Li Dennis Perepelitsa S. Mizuno H. W. Van Hecke Agneta Oskarsson Y. Berdnikov S. H. Lee Y. Akiba C. Mckinney S. Nagamiya Vaclav Vrba X. He Y. Aramaki Robert Vertesi J. Koster M. Ouchida A. Veicht A. Mwai K. N. Barish K. V. Dharmawardane Takahiro Fusayasu Serpil Yalcin M. L. Brooks Ryugo S. Hayano Aaron Angerami B. Love W. A. Zajc L. Xue V. Baublis D. Silvermyr Y. L. Yamaguchi A. Denisov Yuki Watanabe V. Cianciolo Sergey Fokin Y. Riabov Y. Ikeda Kenta Shigaki T. Rinn H. A. Gustafsson H. Pereira R. Akimoto A. Sexton Viktor Riabov R. Seto T. W. Danley A. S. Nyanin A. Yanovich M. Gonin C. Pinkenburg Rachid Nouicer A. N. Zelenski M. Proissl K. Dehmelt B. Meredith C. L. Woody A. Berdnikov John Hill Petr Gallus A. Garishvili I. V. Sourikova T. Sugitate45 J. H. Kang Rui Wei J. S. Haggerty S. R. Lee A. Ster N. Feege François Fleuret G. Roche Z. Rowan Tomoya Tsuji M. Mendoza S. N. White Zvi Hirsh Citron H. Ge K. Nakano K. B. Kim W. E. Sondheim K. Boyle A. Taranenko T. Horaguchi Brajesh K. Singh M. Stepanov H. Asano Eva Haslum Y. S. Lai S. Yokkaichi

subject

Physics Particle physics Meson 010308 nuclear & particles physics Dalitz plot 01 natural sciences Super Proton Synchrotron Particle identification Nuclear physics Pair production 0103 physical sciences High Energy Physics::Experiment Rapidity PHENIX detector Nuclear Experiment 010306 general physics Glauber

description

We present measurements of e+e- production at midrapidity in Au+Au collisions at sNN=200 GeV. The invariant yield is studied within the PHENIX detector acceptance over a wide range of mass (mee<5 GeV/c2) and pair transverse momentum (pT<5 GeV/c) for minimum bias and for five centrality classes. The e+e- yield is compared to the expectations from known sources. In the low-mass region (mee=0.30-0.76 GeV/c2) there is an enhancement that increases with centrality and is distributed over the entire pair pT range measured. It is significantly smaller than previously reported by the PHENIX experiment and amounts to 2.3±0.4(stat)±0.4(syst)±0.2(model) or to 1.7±0.3(stat)±0.3(syst)±0.2(model) for minimum bias collisions when the open heavy-flavor contribution is calculated with pythia or mc@nlo, respectively. The inclusive mass and pT distributions, as well as the centrality dependence, are well reproduced by model calculations where the enhancement mainly originates from the melting of the ρ meson resonance as the system approaches chiral symmetry restoration. In the intermediate-mass region (mee=1.2-2.8 GeV/c2), the data hint at a significant contribution in addition to the yield from the semileptonic decays of heavy-flavor mesons.

year	journal	country	edition	language
2016-01-11	Physical Review C

https://doi.org/10.1103/physrevc.93.014904