Dielectron mass spectra from Au+Au collisions at [s(NN)]=200GeV. uri icon

abstract

  • We report the STAR measurements of dielectron (e(+)e(-)) production at midrapidity (|y(ee)|<1) in Au+Au collisions at [s(NN)]=200GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (-like), 0.76-0.80 (-like), and 0.98-1.05 (-like) GeV/c(2). The spectrum in the -like and -like regions can be well described by the hadronic cocktail simulation. In the -like region, however, the vacuum spectral function cannot describe the shape of the dielectron excess. In this range, an enhancement of 1.770.11(stat)0.24(syst)0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the meson. The excess yield in the -like region increases with the number of collision participants faster than the and yields. Theoretical models with broadened contributions through interactions with constituents in the hot QCD medium provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies.

published proceedings

  • Phys Rev Lett

altmetric score

  • 1.25

author list (cited authors)

  • Adamczyk, L., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., ... STAR Collaboration.

citation count

  • 47

complete list of authors

  • Adamczyk, L||Adkins, JK||Agakishiev, G||Aggarwal, MM||Ahammed, Z||Alekseev, I||Alford, J||Anson, CD||Aparin, A||Arkhipkin, D||Aschenauer, EC||Averichev, GS||Banerjee, A||Barnovska, Z||Beavis, DR||Bellwied, R||Bhasin, A||Bhati, AK||Bhattarai, P||Bichsel, H||Bielcik, J||Bielcikova, J||Bland, LC||Bordyuzhin, IG||Borowski, W||Bouchet, J||Brandin, AV||Brovko, SG||Bültmann, S||Bunzarov, I||Burton, TP||Butterworth, J||Caines, H||Calderón de la Barca Sánchez, M||Cebra, D||Cendejas, R||Cervantes, MC||Chaloupka, P||Chang, Z||Chattopadhyay, S||Chen, HF||Chen, JH||Chen, L||Cheng, J||Cherney, M||Chikanian, A||Christie, W||Chwastowski, J||Codrington, MJM||Cramer, JG||Crawford, HJ||Cui, X||Das, S||Davila Leyva, A||De Silva, LC||Debbe, RR||Dedovich, TG||Deng, J||Derevschikov, AA||Derradi de Souza, R||Dhamija, S||di Ruzza, B||Didenko, L||Dilks, C||Ding, F||Djawotho, P||Dong, X||Drachenberg, JL||Draper, JE||Du, CM||Dunkelberger, LE||Dunlop, JC||Efimov, LG||Engelage, J||Engle, KS||Eppley, G||Eun, L||Evdokimov, O||Fatemi, R||Fazio, S||Fedorisin, J||Filip, P||Finch, E||Fisyak, Y||Flores, CE||Gagliardi, CA||Gangadharan, DR||Garand, D||Geurts, F||Gibson, A||Girard, M||Gliske, S||Grosnick, D||Guo, Y||Gupta, A||Gupta, S||Guryn, W||Haag, B||Hajkova, O||Hamed, A||Han, L-X||Haque, R||Harris, JW||Heppelmann, S||Hirsch, A||Hoffmann, GW||Hofman, DJ||Horvat, S||Huang, B||Huang, HZ||Huang, X||Huck, P||Humanic, TJ||Igo, G||Jacobs, WW||Jang, H||Judd, EG||Kabana, S||Kalinkin, D||Kang, K||Kauder, K||Ke, HW||Keane, D||Kechechyan, A||Kesich, A||Khan, ZH||Kikola, DP||Kisel, I||Kisiel, A||Koetke, DD||Kollegger, T||Konzer, J||Koralt, I||Korsch, W||Kotchenda, L||Kravtsov, P||Krueger, K||Kulakov, I||Kumar, L||Kycia, RA||Lamont, MAC||Landgraf, JM||Landry, KD||Lauret, J||Lebedev, A||Lednicky, R||Lee, JH||LeVine, MJ||Li, C||Li, W||Li, X||Li, X||Li, Y||Li, ZM||Lima, LM||Lisa, MA||Liu, F||Ljubicic, T||Llope, WJ||Longacre, RS||Luo, X||Ma, GL||Ma, YG||Madagodagettige Don, DMMD||Mahapatra, DP||Majka, R||Margetis, S||Markert, C||Masui, H||Matis, HS||McDonald, D||McShane, TS||Minaev, NG||Mioduszewski, S||Mohanty, B||Mondal, MM||Morozov, DA||Munhoz, MG||Mustafa, MK||Nandi, BK||Nasim, Md||Nayak, TK||Nelson, JM||Nogach, LV||Noh, SY||Novak, J||Nurushev, SB||Odyniec, G||Ogawa, A||Oh, K||Ohlson, A||Okorokov, V||Oldag, EW||Oliveira, RAN||Pachr, M||Page, BS||Pal, SK||Pan, YX||Pandit, Y||Panebratsev, Y||Pawlak, T||Pawlik, B||Pei, H||Perkins, C||Peryt, W||Pile, P||Planinic, M||Pluta, J||Plyku, D||Poljak, N||Porter, J||Poskanzer, AM||Pruthi, NK||Przybycien, M||Pujahari, PR||Qiu, H||Quintero, A||Ramachandran, S||Raniwala, R||Raniwala, S||Ray, RL||Riley, CK||Ritter, HG||Roberts, JB||Rogachevskiy, OV||Romero, JL||Ross, JF||Roy, A||Ruan, L||Rusnak, J||Sahoo, NR||Sahu, PK||Sakrejda, I||Salur, S||Sandacz, A||Sandweiss, J||Sangaline, E||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, B||Shen, WQ||Shi, SS||Shou, QY||Sichtermann, EP||Singaraju, RN||Skoby, MJ||Smirnov, D||Smirnov, N||Solanki, D||Sorensen, P||deSouza, UG||Spinka, HM||Srivastava, B||Stanislaus, TDS||Stevens, JR||Stock, R||Strikhanov, M||Stringfellow, B||Suaide, AAP||Sumbera, M||Sun, X||Sun, XM||Sun, Y||Sun, Z||Surrow, B||Svirida, DN||Symons, TJM||Szanto de Toledo, A||Takahashi, J||Tang, AH||Tang, Z||Tarnowsky, T||Thomas, JH||Timmins, AR||Tlusty, D||Tokarev, M||Trentalange, S||Tribble, RE||Tribedy, P||Trzeciak, BA||Tsai, OD||Turnau, J||Ullrich, T||Underwood, DG||Van Buren, G||van Nieuwenhuizen, G||Vanfossen, JA||Varma, R||Vasconcelos, GMS||Vasiliev, AN||Vertesi, R||Videbæk, F||Viyogi, YP||Vokal, S||Vossen, A||Wada, M||Wang, F||Wang, G||Wang, H||Wang, JS||Wang, XL||Wang, Y||Wang, Y||Webb, G||Webb, JC||Westfall, GD||Wieman, H||Wissink, SW||Witt, R||Wu, YF||Xiao, Z||Xie, W||Xin, K||Xu, H||Xu, N||Xu, QH||Xu, Y||Xu, Z||Yan, W||Yang, C||Yang, Y||Yang, Y||Ye, Z||Yepes, P||Yi, L||Yip, K||Yoo, I-K||Zawisza, Y||Zbroszczyk, H||Zha, W||Zhang, JB||Zhang, JL||Zhang, S||Zhang, XP||Zhang, Y||Zhang, ZP||Zhao, F||Zhao, J||Zhong, C||Zhu, X||Zhu, YH||Zoulkarneeva, Y||Zyzak, M

publication date

  • July 2014