Energy and charged particle flow in [Formula Presented] GeV/[Formula Presented] Au+Au collisions

J. Barrette, R. Bellwied, S. Bennett, P. Braun-Munzinger, W. C. Chang, W. E. Cleland, M. Clemen, J. Cole, T. M. Cormier, G. David, J. Dee, O. Dietzsch, M. Drigert, J. R. Hall, T. K. Hemmick, N. Herrmann, B. Hong, Y. Kwon, R. Lacasse, A. LukaszewQ. Li, T. W. Ludlam, S. K. Mark, R. Matheus, S. McCorkle, J. T. Murgatroyd, E. O’Brien, S. Panitkin, T. Piazza, C. Pruneau, M. N. Rao, M. Rosati, N. C. da Silva, S. Sedykh, U. Sonnadara, J. Stachel, E. M. Takagui, S. Voloshin, G. Wang, J. P. Wessels, C. L. Woody, N. Xu, Y. Zhang, C. Zou

Research output: Contribution to journalArticlepeer-review

145 Citations (Scopus)


Experimental results and a detailed analysis are presented of the transverse energy and charged particle azimuthal distributions measured by the E877 Collaboration for different centralities of Au+Au collisions at a beam momentum of 10.8[Formula Presented] GeV/[Formula Presented]. The anisotropy of these distributions is studied with respect to the reaction plane reconstructed on an event-by-event basis using the transverse energy distribution measured by calorimeters. Results are corrected for the reaction plane resolution. For semicentral events we observe directed flow signals of up to 10%. We observe a stronger anisotropy for slow charged particles. For both the charged particle and transverse energy distributions we observe a small but nonzero elliptic anisotropy with the major axis pointing into the reaction plane. Combining the information on transverse energy and charged particle flow we obtain information on the flow of nucleons and pions. The data are compared to event generators and the need to introduce a mean field or nucleon-nucleon potential is discussed.

Original languageEnglish
Pages (from-to)1420-1430
Number of pages11
JournalPhysical Review C - Nuclear Physics
Issue number3
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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