Phys. Rev. C
66,
021901(R)
(2002)
[5 pages]
Centrality and momentum-selected elliptic flow: Tighter constraints for the nuclear equation of state
P. Chung et al. (E895 Collaboration)
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P. Chung1, N. N. Ajitanand1, J. M. Alexander1, J. Ames1, M. Anderson5, D. Best2, F. P. Brady5, T. Case2, W. Caskey5, D. Cebra5, J. L. Chance5, B. Cole11, K. Crowe2, A. C. Das3, J. E. Draper5, M. L. Gilkes1, S. Gushue1,9, M. Heffner5, A. S. Hirsch7, E. L. Hjort7, W. Holzmann1, L. Huo13, M. Issah1, M. Justice4, M. Kaplan8, D. Keane4, J. C. Kintner12, J. Klay5, D. Krofcheck10, R. A. Lacey1, J. Lauret1, M. A. Lisa3, H. Liu4, Y. M. Liu13, J. Milan1, R. McGrath1, Z. Milosevich8, G. Odyniec2, D. L. Olson2, S. Panitkin4, N. T. Porile7, G. Rai2, H. G. Ritter2, J. L. Romero5, R. Scharenberg7, L. Schroeder2, B. Srivastava7, N. T. B. Stone2, T. J. M. Symons2, J. Whitfield8, T. Wienold2, R. Witt4, L. Wood5, and W. N. Zhang13 (E895 Collaboration)
P. Danielewicz6
1Departments of Chemistry and Physics, SUNY at Stony Brook, New York 11794-3400 2Lawrence Berkeley National Laboratory, Berkeley, California 94720 3Ohio State University, Columbus, Ohio 43210 4Kent State University, Kent, Ohio 44242 5University of California, Davis, California 95616 6Michigan State University, East Lansing Michigan 48824-1321 andGesellschaft für Schwerionenforschung, Darmstadt D-64291, Germany 7Purdue University, West Lafayette, Indiana 47907-1396 8Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 9Brookhaven National Laboratory, Upton, New York 11973 10University of Auckland, Auckland, New Zealand 11Columbia University, New York, New York 10027 12St. Mary’s College, Moraga, California 94575 13Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Received 3 December 2001; published 20 August 2002
Proton elliptic flow is studied as a function of impact parameter b, for two transverse momentum cuts in 2–6AGeV Au+Au collisions. The elliptic flow shows an essentially linear dependence on b (for 1.5<b<8fm) with a negative slope at 2AGeV, a positive slope at 6AGeV, and near zero slope at 4AGeV. These selective flow measurements provide better understanding of the interplay of the different factors responsible for the generation of elliptic flow at AGS energies. In addition, extensive comparisons of the measured and calculated flow values indicate that such measurements offer much more stringent constraints for discriminating between various equations of state.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.66.021901
DOI:
10.1103/PhysRevC.66.021901
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