Elliptic flow in Au plus Au collisions at root s(NN)=130 GeV

Ackermann, KH Adams, N Adler, C Ahammed, Z Ahmad, S Allgower, C Amsbaugh, J Anderson, M Anderssen, E Arnesen, H Arnold, L Averichev, GS Baldwin, A Balewski, J Barannikova, O Barnby, LS Baudot, J Beddo, M Bekele, S Belaga, VV Bellwied, R Bennett, S Bercovitz, J Berger, J Betts, W Bichsel, H Bieser, F Bland, LC Bloomer, M Blyth, CO Boehm, J Bonner, BE Bonnet, D Bossingham, R Botlo, M Boucham, A Bouillo, N Bouvier, S Bradley, K Brady, FP Braithwaite, ES Braithwaite, W Brandin, A Brown, RL Brugalette, G Byrd, C Caines, H Sanchez, MCD Cardenas, A Carr, L Carroll, J Castillo, J Caylor, B Cebra, D Chatopadhyay, S Chen, ML Chen, W Chen, Y Chernenko, SP Cherney, M Chikanian, A Choi, B Chrin, J Christie, W Coffin, JP Conin, L Consiglio, C Cormier, TM Cramer, JG Crawford, HJ Danilov, VI Dayton, D DeMello, M Deng, WS Derevschikov, AA Dialinas, M Diaz, H DeYoung, PA Didenko, L Dimassimo, D Dioguardi, J Dominik, W Drancourt, C Draper, JE Dunin, VB Dunlop, JC Eckardt, V Edwards, WR Efimov, LG Eggert, T Emelianov, V Engelage, J Eppley, G Erazmus, B Etkin, A Fachini, P Feliciano, C Ferenc, D Ferguson, MI Fessler, H Finch, E Fine, V Fisyak, Y Flierl, D Flores, I Foley, KJ Fritz, D Gagunashvili, N Gans, J Gazdzicki, M Germain, M Geurts, F Ghazikhanian, V Gojak, C Grabski, J Grachov, O Grau, M Greiner, D Greiner, L Grigoriev, V Grosnick, D Gross, J Guilloux, G Gushin, E Hall, J Hallman, TJ Hardtke, D Harper, G Harris, JW He, P Heffner, M Heppelmann, S Herston, T Hill, D Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horsley, M Howe, M Huang, HZ Humanic, TJ Hummler, H Hunt, W Hunter, J Igo, GJ Ishihara, A Ivanshin, YI Jacobs, P Jacobs, WW Jacobson, S Jared, R Jensen, P Johnson, I Jones, PG Judd, E Kaneta, M Kaplan, M Keane, D Kenney, VP Khodinov, A Klay, J Klein, SR Klyachko, A Koehler, G Konstantinov, AS Kormilitsyne, V Kotchenda, L Kotov, I Kovalenko, AD Kramer, M Kravtsov, P Krueger, K Krupien, T Kuczewski, P Kuhn, C Kunde, GJ Kunz, CL Kutuev, RK Kuznetsov, AA Lakehal-Ayat, L Lamas-Valverde, J Lamont, MAC Landgraf, JM Lange, S Lansdell, CP Lasiuk, B Laue, F Lebedev, A LeCompte, T Leonhardt, WJ Leontiev, VM Leszczynski, P LeVine, MJ Li, Q Li, Q Li, Z Liaw, CJ Lin, J Lindenbaum, SJ Lindenstruth, V Lindstrom, PJ Lisa, MA Liu, H Ljubicic, T Llope, WJ LoCurto, G Long, H Longacre, RS Lopez-Noriega, M Lopiano, D Love, WA Lutz, JR Lynn, D Madansky, L Maier, R Majka, R Maliszewski, A Margetis, S Marks, K Marstaller, R Martin, L Marx, J Matis, HS Matulenko, YA Matyushevski, EA McParland, C McShane, TS Meier, J Melnick, Y Meschanin, A Middlekamp, P Mikhalin, N Miller, B Milosevich, Z Minaev, NG Minor, B Mitchell, J Mogavero, E Moiseenko, VA Moltz, D Moore, CF Morozov, V Morse, R de Moura, MM Munhoz, MG Mutchler, GS Nelson, JM Nevski, P Ngo, T Nguyen, M Nguyen, T Nikitin, VA Nogach, LV Noggle, T Norman, B Nurushev, SB Nussbaum, T Nystrand, J Odyniec, G Ogawa, A Ogilvie, CA Olchanski, K Oldenburg, M Olson, D Ososkov, GA Ott, G Padrazo, D Paic, G Pandey, SU Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Pentia, M Perevotchikov, V Peryt, W Petrov, VA Pinganaud, W Pirogov, S Platner, E Pluta, J Polk, I Porile, N Porter, J Poskanzer, AM Potrebenikova, E Prindle, D Pruneau, C Puskar-Pasewicz, J Rai, G Rasson, J Ravel, O Ray, RL Razin, SV Reichhold, D Reid, J Renfordt, RE Retiere, F Ridiger, A Riso, J Ritter, HG Roberts, JB Roehrich, D Rogachevski, OV Romero, JL Roy, C Russ, D Rykov, V Sakrejda, I Sanchez, R Sandler, Z Sandweiss, J Sappenfield, P Saulys, AC Savin, I Schambach, J Scharenberg, RP Scheblien, J Scheetz, R Schlueter, R Schmitz, N Schroeder, LS Schulz, M Schuttauf, A Sedlmeir, J Seger, J Seliverstov, D Seyboth, J Seyboth, P Seymour, R Shakaliev, EI Shestermanov, KE Shi, Y Shimanskii, SS Shuman, D Shvetcov, VS Skoro, G Smirnov, N Smykov, LP Snellings, R Solberg, K Sowinski, J Spinka, HM Srivastava, B Stephenson, EJ Stock, R Stolpovsky, A Stone, N Stone, R Strikhanov, M Stringfellow, B Stroebele, H Struck, C Suaide, AAP Sugarbaker, E Suire, C Symons, TJM Takahashi, J Tang, AH Tarchini, A Tarzian, J Thomas, JH Tikhomirov, V de Toledo, AS Tonse, S Trainor, T Trentalange, S Tokarev, M Tonjes, MB Trofimov, V Tsai, O Turner, K Ullrich, T Underwood, DG Vakula, I Van Buren, G VanderMolen, AM Vanyashin, A Vasilevski, IM Vasiliev, AN Vigdor, SE Visser, G Voloshin, SA Vu, C Wang, F Ward, H Weerasundara, D Weidenbach, R Wells, R Wells, R Wenaus, T Westfall, GD Whitfield, JP Whitten, C Wieman, H Willson, R Wilson, K Wirth, J Wisdom, J Wissink, SW Witt, R Wolf, J Wood, L Xu, N Xu, Z Yakutin, AE Yamamoto, E Yang, J Yepes, P Yokosawa, A Yurevich, VI Zanevski, YV Zhang, J Zhang, WM Zhu, J Zimmerman, D Zoulkarneev, R Zubarev, AN

Kh. Ackermann et al., Elliptic flow in Au plus Au collisions at root s(NN)=130 GeV, PHYS REV L, 86(3), 2001, pp. 402-407

28

INGLESE

Article

Physics

PHYSICAL REVIEW LETTERS

0031-9007 → ACNP

86

3

2001

402 - 407

ISI

0031-9007(20010115)86:3<402:EFIAPA>2.0.ZU;2-M

Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au + Au collisions at rootS(NN) = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v(2), averaged over transverse mom entum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the o bservation of a higher degree of thermalization than at lower collision ene rgies. Pseudorapidity and transverse momentum dependence of elliptic how ar e also presented.