Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment
Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alekseev, I; Alford, J; Aparin, A; Arkhipkin, D; Aschenauer, EC; Averichev, GS; Banerjee, A; Bellwied, R; Bhasin, A; Bhati, AK; Bhattarai, P; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Bouchet, J; Brandin, AV; Bunzarov, I; Burton, TP; Butterworth, J; Caines, H; Sanchez, MCD; Campbell, JM; Cebra, D; Cervantes, MC; Chakaberia, I; Chaloupka, P; Chang, Z; Chattopadhyay, S; Chen, JH; Chen, X; Cheng, J; Cherney, M; Christie, W; Contin, G; Crawford, HJ; Das, S; De Silva, LC; Debbe, RR; Dedovich, TG; Deng, J; Derevschikov, AA; di Ruzza, B; Didenko, L; Dilks, C; Dong, X; Drachenberg, JL; Draper, JE; Du, CM; Dunkelberger, LE; Dunlop, JC; Efimov, LG; Engelage, J; Eppley, G; Esha, R; Evdokimov, O; Eyser, O; Fatemi, R; Fazio, S; Federic, P; Fedorisin, J; Feng, Z; Filip, P; Fisyak, Y; Flores, CE; Fulek, L; Gagliardi, CA; Garand, D; Geurts, F; Gibson, A; Girard, M; Greiner, L; Grosnick, D; Gunarathne, DS; Guo, Y; Gupta, S; Gupta, A; Guryn, W; Hamad, A; Hamed, A; Haque, R; Harris, JW; He, L; Heppelmann, S; Heppelmann, S; Hirsch, A; Hoffmann, GW; Hofman, DJ; Horvat, S; Huang, B; Huang, X; Huang, HZ; Huck, P; Humanic, TJ; Igo, G; Jacobs, WW; Jang, H; Jiang, K; Judd, EG; Jung, K; Kabana, S; Kalinkin, D; Kang, K; Kauder, K; Ke, HW; Keane, D; Kechechyan, A; Khan, ZH; Kikola, DP; Kisel, I; Kisiel, A; Kochenda, L; Koetke, DD; Kollegger, T; Kosarzewski, LK; Kraishan, AF; Kravtsov, P; Krueger, K; Kulakov, I; Kumar, L; Kycia, RA; Lamont, MAC; Landgraf, JM; Landry, KD; Lauret, J; Lebedev, A; Lednicky, R; Lee, JH; Li, X; Li, C; Li, W; Li, ZM; Li, Y; Li, X; Lisa, MA; Liu, F; Ljubicic, T; Llope, WJ; Lomnitz, M; Longacre, RS; Luo, X; Ma, YG; Ma, GL; Ma, L; Ma, R; Magdy, N; Majka, R; Manion, A; Margetis, S; Markert, C; Masui, H; Matis, HS; McDonald, D; Meehan, K; Minaev, NG; Mioduszewski, S; Mohanty, B; Mondal, MM; Morozov, D; Mustafa, MK; Nandi, BK; Nasim, M; Nayak, TK; Nigmatkulov, G; Nogach, LV; Noh, SY; Novak, J; Nurushev, SB; Odyniec, G; Ogawa, A; Oh, K; Okorokov, V; Olvitt, D; Page, BS; Pak, R; Pan, YX; Pandit, Y; Panebratsev, Y; Pawlik, B; Pei, H; Perkins, C; Peterson, A; Pile, P; Planinic, M; Pluta, J; Poljak, N; Poniatowska, K; Porter, J; Posik, M; Poskanzer, AM; Pruthi, NK; Putschke, J; Qiu, H; Quintero, A; Ramachandran, S; Raniwala, R; Raniwala, S; Ray, RL; Ritter, HG; Roberts, JB; Rogachevskiy, OV; Romero, JL; Roy, A; Ruan, L; Rusnak, J; Rusnakova, O; Sahoo, NR; Sahu, PK; Sakrejda, I; Salur, S; Sandweiss, J; Sarkar, A; Schambach, J; Scharenberg, RP; Schmah, AM; Schmidke, WB; Schmitz, N; Seger, J; Seyboth, P; Shah, N; Shahaliev, E; Shanmuganathan, PV; Shao, M; Sharma, MK; Sharma, B; Shen, WQ; Shi, SS; Shou, QY; Sichtermann, EP; Sikora, R; Simko, M; Skoby, MJ; Smirnov, D; Smirnov, N; Song, L; Sorensen, P; Spinka, HM; Srivastava, B; Stanislaus, TDS; Stepanov, M; Stock, R; Strikhanov, M; Stringfellow, B; Sumbera, M; Summa, B; Sun, X; Sun, Z; Sun, XM; Sun, Y; Surrow, B; Svirida, N; Szelezniak, MA; Tang, AH; Tang, Z; Tarnowsky, T; Tawfik, AN; Thomas, JH; Timmins, AR; Tlusty, D; Tokarev, M; Trentalange, S; Tribble, RE; Tribedy, P; Tripathy, SK; Trzeciak, BA; Tsai, OD; Ullrich, T; Underwood, DG; Upsal, I; Van Buren, G; van Nieuwenhuizen, G; Vandenbroucke, M; Varma, R; Vasiliev, AN; Vertesi, R; Videbaek, F; Viyogi, YP; Vokal, S; Voloshin, SA; Vossen, A; Wang, G; Wang, Y; Wang, F; Wang, Y; Wang, H; Wang, JS; Webb, JC; Webb, G; Wen, L; Westfall, GD; Wieman, H; Wissink, SW; Witt, R; Wu, YF; Xiao, ZG; Xie, W; Xin, K; Xu, QH; Xu, Z; Xu, H; Xu, N; Xu, YF; Yang, Q; Yang, Y; Yang, S; Yang, Y; Yang, C; Ye, Z; Yepes, P; Yi, L; Yip, K; Yoo, IK; Yu, N; Zbroszczyk, H; Zha, W; Zhang, XP; Zhang, J; Zhang, Y; Zhang, J; Zhang, JB; Zhang, S; Zhang, Z; Zhao, J; Zhong, C; Zhou, L; Zhu, X; Zoulkarneeva, Y; Zyzak, M; Adamczyk, L (reprint author), AGH Univ Sci & Technol, PL-30059 Krakow, Poland.
2015
发表期刊PHYSICAL REVIEW C
ISSN0556-2813
卷号92期号:2页码:
文章类型期刊文献
摘要We report on measurements of dielectron (e(+) e(-)) production in Au + Au collisions at a center-of-mass energy of 200 GeV per nucleon-nucleon pair using the STAR detector at BNL Relativistic Heavy Ion Collider. Systematic measurements of the dielectron yield as a function of transverse momentum (p(T)) and collision centrality show an enhancement compared to a cocktail simulation of hadronic sources in the low invariant-mass region (M-ee < 1 GeV / c(2)). This enhancement cannot be reproduced by the rho-meson vacuum spectral function. In minimum-bias collisions, in the invariant-mass range of 0.30-0.76 GeV / c(2), integrated over the full pT acceptance, the enhancement factor is 1.76 +/- 0.06 (stat.) +/- 0.26 (sys.) +/- 0.29 (cocktail). The enhancement factor exhibits weak centrality and pT dependence in STAR's accessible kinematic regions, while the excess yield in this invariant-mass region as a function of the number of participating nucleons follows a power-law shape with a power of 1.44 +/- 0.10. Models that assume an in-medium broadening of the rho-meson spectral function consistently describe the observed excess in these measurements. Additionally, we report on measurements of omega-and phi-meson production through their e+ e(-) decay channel. These measurements show good agreement with Tsallis blast-wave model predictions, as well as, in the case of the phi meson, results through its K+ K- decay channel. In the intermediate invariant-mass region (1.1 < Mee < 3 GeV / c(2)), we investigate the spectral shapes from different collision centralities. Physics implications for possible in-medium modification of charmed hadron production and other physics sources are discussed.
关键词Relativistic Nuclear Collisions Super-proton Synchrotron Heavy-ion Collisions Dilepton Production Chiral Restoration Transport Approach Sps Energies Cern-sps Multiplicity Flow
语种英语
WOS记录号WOS:000359944200007
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文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/24985
专题中科院上海应用物理研究所2011-2018年
通讯作者Adamczyk, L (reprint author), AGH Univ Sci & Technol, PL-30059 Krakow, Poland.
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Adamczyk, L,Adkins, JK,Agakishiev, G,et al. Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment[J]. PHYSICAL REVIEW C,2015,92(2):—.
APA Adamczyk, L.,Adkins, JK.,Agakishiev, G.,Aggarwal, MM.,Ahammed, Z.,...&Adamczyk, L .(2015).Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment.PHYSICAL REVIEW C,92(2),—.
MLA Adamczyk, L,et al."Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment".PHYSICAL REVIEW C 92.2(2015):—.
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