Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV
| Data(s) |
2010
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| Resumo |
We present the results of an elliptic flow, v(2), analysis of Cu + Cu collisions recorded with the solenoidal tracker detector (STAR) at the BNL Relativistic Heavy Ion Collider at root s(NN) = 62.4 and 200 GeV. Elliptic flow as a function of transverse momentum, v(2)(p(T)), is reported for different collision centralities for charged hadrons h(+/-) and strangeness-ontaining hadrons K-S(0), Lambda, Xi, and phi in the midrapidity region vertical bar eta vertical bar < 1.0. Significant reduction in systematic uncertainty of the measurement due to nonflow effects has been achieved by correlating particles at midrapidity, vertical bar eta vertical bar < 1.0, with those at forward rapidity, 2.5 < vertical bar eta vertical bar < 4.0. We also present azimuthal correlations in p + p collisions at root s = 200 GeV to help in estimating nonflow effects. To study the system-size dependence of elliptic flow, we present a detailed comparison with previously published results from Au + Au collisions at root s(NN) = 200 GeV. We observe that v(2)(p(T)) of strange hadrons has similar scaling properties as were first observed in Au + Au collisions, that is, (i) at low transverse momenta, p(T) < 2 GeV/c, v(2) scales with transverse kinetic energy, m(T) - m, and (ii) at intermediate p(T), 2 < p(T) < 4 GeV/c, it scales with the number of constituent quarks, n(q.) We have found that ideal hydrodynamic calculations fail to reproduce the centrality dependence of v(2)(p(T)) for K-S(0) and Lambda. Eccentricity scaled v(2) values, v(2)/epsilon, are larger in more central collisions, suggesting stronger collective flow develops in more central collisions. The comparison with Au + Au collisions, which go further in density, shows that v(2)/epsilon depends on the system size, that is, the number of participants N-part. This indicates that the ideal hydrodynamic limit is not reached in Cu + Cu collisions, presumably because the assumption of thermalization is not attained. |
| Identificador | |
| Idioma(s) |
英语 |
| Fonte |
Abelev, BI; Aggarwal, MM; Ahammed, Z; Alakhverdyants, AV; Alekseev, I; Anderson, BD; Arkhipkin, D; Averichev, GS; Balewski, J; Barnby, LS; Baumgart, S; Beavis, DR; Bellwied, R; Betancourt, MJ; Betts, RR; Bhasin, A; Bhati, AK; Bichsel, H; Bielcik, J; Bielcikova, J; Biritz, B; Bland, LC; Bonner, BE; Bouchet, J; Braidot, E; Brandin, AV; Bridgeman, A; Bruna, E; Bueltmann, S; Bunzarov, I; Burton, TP; Cai, XZ; Caines, H; Sanchez, MCD; Catu, O; Cebra, D; Cendejas, R; Cervantes, MC; Chajecki, Z; Chaloupka, P; Chattopadhyay, S; Chen, HF; Chen, JH; Chen, JY; Cheng, J; Cherney, M; Chikanian, A; Choi, KE; Christie, W; Chung, P; Clarke, RF; Codrington, MJM; Corliss, R; Cramer, JG; Crawford, HJ; Das, D; Dash, S; Leyva, AD; De Silva, LC; Debbe, RR; Dedovich, TG; DePhillips, M; Derevschikov, AA; de Souza, RD; Didenko, L; Djawotho, P; Dogra, SM; Dong, X; Drachenberg, JL; Draper, JE; Dunlop, JC; Mazumdar, MRD; Efimov, LG; Elhalhuli, E; Elnimr, M; Engelage, J; Eppley, G; Erazmus, B; Estienne, M; Eun, L; Evdokimov, O; Fachini, P; Fatemi, R; Fedorisin, J; Fersch, RG; Filip, P; Finch, E; Fine, V; Fisyak, Y; Gagliardi, CA; Gangadharan, DR; Ganti, MS; Garcia-Solis, EJ; Geromitsos, A; Geurts, F; Ghazikhanian, V; Ghosh, P; Gorbunov, YN; Gordon, A; Grebenyuk, O; Grosnick, D; Grube, B; Guertin, SM; Gupta, A; Gupta, N; Guryn, W; Haag, B; Hamed, A; Han, LX; Harris, JW; Hays-Wehle, JP; Heinz, M; Heppelmann, S; Hirsch, A; Hjort, E; Hoffman, AM; Hoffmann, GW; Hofman, DJ; Hollis, RS; Huang, HZ; Humanic, TJ; Huo, L; Igo, G; Iordanova, A; Jacobs, P; Jacobs, WW; Jakl, P; Jena, C; Jin, F; Jones, CL; Jones, PG; Joseph, J; Judd, EG; Kabana, S; Kajimoto, K; Kang, K; Kapitan, J; Kauder, K; Keane, D; Kechechyan, A; Kettler, D; Kikola, DP; Kiryluk, J; Kisiel, A; Klein, SR; Knospe, AG; Kocoloski, A; Koetke, DD; Kollegger, T; Konzer, J; Kopytine, M; Koralt, I; Koroleva, L; Korsch, W; Kotchenda, L; Kouchpil, V; Kravtsov, P; Krueger, K; Krus, M; Kumar, L; Kurnadi, P; Lamont, MAC; Landgraf, JM; LaPointe, S; Lauret, J; Lebedev, A; Lednicky, R; Lee, CH; Lee, JH; Leight, W; LeVine, MJ; Li, C; Li, L; Li, N; Li, W; Li, X; Li, X; Li, Y; Li, Z; Lin, G; Lindenbaum, SJ; Lisa, MA; Liu, F; Liu, H; Liu, J; Ljubicic, T; Llope, WJ; Longacre, RS; Love, WA; Lu, Y; Ma, GL; Ma, YG; Mahapatra, DP; Majka, R; Mall, OI; Mangotra, LK; Manweiler, R; Margetis, S; Markert, C; Masui, H; Matis, HS; Matulenko, YA; McDonald, D; McShane, TS; Meschanin, A; Milner, R; Minaev, NG; Mioduszewski, S; Mischke, A; Mitrovski, MK; Mohanty, B; Mondal, MM; Morozov, B; Morozov, DA; Munhoz, MG; Nandi, BK; Nattrass, C; Nayak, TK; Nelson, JM; Netrakanti, PK; Ng, MJ; Nogach, LV; Nurushev, SB; Odyniec, G; Ogawa, A; Okada, H; Okorokov, V; Olson, D; Pachr, M; Page, BS; Pal, SK; Pandit, Y; Panebratsev, Y; Pawlak, T; Peitzmann, T; Perevoztchikov, V; Perkins, C; Peryt, W; Phatak, SC; Pile, P; Planinic, M; Ploskon, MA; Pluta, J; Plyku, D; Poljak, N; Poskanzer, AM; Potukuchi, BVKS; Powell, CB; Prindle, D; Pruneau, C; Pruthi, NK; Pujahari, PR; Putschke, J; Raniwala, R; Raniwala, S; Ray, RL; Redwine, R; Reed, R; Rehberg, JM; Ritter, HG; Roberts, JB; Rogachevskiy, OV; Romero, JL; Rose, A; Roy, C; Ruan, L; Sahoo, R; Sakai, S; Sakrejda, I; Sakuma, T; Salur, S; Sandweiss, J; Sangaline, E; Schambach, J; Scharenberg, RP; Schmitz, N; Schuster, TR; Seele, J; Seger, J; Selyuzhenkov, I; Seyboth, P; Shahaliev, E; Shao, M; Sharma, M; Shi, SS; Shi, XH; Sichtermann, EP; Simon, F; Singaraju, RN; Skoby, MJ; Smirnov, N; Sorensen, P; Sowinski, J; Spinka, HM; Srivastava, B; Stanislaus, TDS; Staszak, D; Stevens, JR; Stock, R; Strikhanov, M; Stringfellow, B; Suaide, AAP; Suarez, MC; Subba, NL; Sumbera, M; Sun, XM; Sun, Y; Sun, Z; Surrow, B; Svirida, DN; Symons, TJM; de Toledo, AS; Takahashi, J; Tang, AH; Tang, Z; Tarini, LH; Tarnowsky, T; Thein, D; Thomas, JH; Tian, J; Timmins, AR; Timoshenko, S; Tlusty, D; Tokarev, M; Tram, VN; Trentalange, S; Tribble, RE; Tsai, OD; Ulery, J; Ullrich, T; Underwood, DG; Van Buren, G; van Leeuwen, M; van Nieuwenhuizen, G; Vanfossen, JA; Varma, R; Vasconcelos, GMS; Vasiliev, AN; Videbaek, F; Viyogi, YP; Vokal, S; Voloshin, SA; Wada, M; Walker, M; Wang, F; Wang, G; Wang, H; Wang, JS; Wang, Q; Wang, XL; Wang, Y; Webb, G; Webb, JC; Westfall, GD; Whitten, C; Wieman, H; Wingfield, E; Wissink, SW; Witt, R; Wu, Y; Xie, W; Xu, N; Xu, QH; Xu, W; Xu, Y; Xu, Z; Xue, L; Yang, Y; Yepes, P; Yip, K; Yoo, IK; Yue, Q; Zawisza, M; Zbroszczyk, H; Zhan, W; Zhang, S; Zhang, WM; Zhang, XP; Zhang, Y; Zhang, ZP; Zhao, J; Zhong, C; Zhou, J; Zhou, W; Zhu, X; Zhu, YH; Zoulkarneev, R; Zoulkarneeva, Y.Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV,PHYSICAL REVIEW C,2010,81(4):44902 |
| Palavras-Chave | #QUARK-GLUON PLASMA #HEAVY-ION COLLISIONS #RELATIVISTIC NUCLEAR COLLISIONS #PHI-MESON PRODUCTION #ANISOTROPIC FLOW #PHASE-TRANSITION #CENTRALITY DEPENDENCE #SIGNATURE #STAR #COLLABORATION |
| Tipo |
期刊论文 |
