Identified particle elliptic flow in Au + Au collisions at √sNN = 130 GeV

C. Adler,Zubayer Ahammed, C. E. Allgower, J. Amonett, B. D. Anderson,Matthew J. Anderson,G. S. Averichev, J. Balewski, O. Barannikova,Lee Stuart Barnby,J. Baudot,S. Bekele,V. V. Belaga,R. Bellwied, J. Berger,H. Bichsel,L. C. Bland, C. O. Blyth, B. E. Bonner, R. Bossingham, A. Boucham, A. V. Brandin, R. V. Cadman,H. Caines,M. Calderón de la Barca Sánchez,A. Cardenas, J. Carroll, J. Castillo,M. Castro, D. Cebra,Subhasis Chattopadhyay,Mingshui Chen,Yu Chen, S. P. Chernenko,M. Cherney, A. Chikanian, B. Choi, W. Christie, J. P. Coffin, L. Conin,Thomas Michael Cormier,J. G. Cramer,H. J. Crawford, M. DeMello, W. S. Deng, A. A. Derevschikov,L. Didenko, J. E. Draper,V. B. Dunin,J. C. Dunlop, V. Eckardt,L. G. Efimov,V. Emelianov,J. Engelage, G. Eppley,B. Erazmus, P. Fachini,E. Finch,Y. Fisyak, D. Flierl, K. J. Foley, J. Fu, N.D. Gagunashvili,J. Gans, L. Gaudichet,Marie Germain,Frank Jm Geurts,V. Ghazikhanian, J. Grabski,O. A. Grachov,D.E. Greiner, V. Grigoriev, M. Guedon, E. Gushin,T. J. Hallman,D. Hardtke,J. W. Harris,M. Heffner, S. Heppelmann, T. Herston,Boris Hippolyte, A. S. Hirsch, E. Hjort, Gerald W Hoffmann, M. Horsley, H. Z. Huang, T. J. Humanic, H. Hümmler, G. Igo, A. Ishihara,Yu. Ivanshin,Peter Martin Jacobs,W. W. Jacobs,Malgorzata Anna Janik,Ian Johnson,Peter Graham Jones,E. G. Judd,Masashi Kaneta,Morton Kaplan,D. Keane

Physical Review Letters（2001）

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摘要

We report first results on elliptic flow of identified particles at midrapidity in Au+Au collisions at √(sNN)= 130 GeV using the STAR TPC at RHIC. The elliptic flow as a function of transverse momentum and centrality differs significantly for particles of different masses. This dependence can be accounted for in hydrodynamic models, indicating that the system created shows a behavior consistent with collective hydrodynamical flow. The fit to the data with a simple model gives information on the temperature and flow velocities at freeze-out.

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