Measurements of neutrons in 11.5A GeV/c Au+Pb heavy-ion collisions

T. A. Armstrong, K. N. Barish, S. Batsouli, S. J. Bennett, A. Chikanian, S. D. Coe, T. M. Cormier, R. Davies, C. B. Dover, P. Fachini, B. Fadem, L. E. Finch, N. K. George, S. V. Greene, P. Haridas, J. C. Hill, A. S. Hirsch, R. Hoversten, H. Z. Huang, B. S. KumarT. Lainis, J. G. Lajoie, R. A. Lewis, Q. Li, B. Libby, R. D. Majka, T. E. Miller, M. G. Munhoz, J. L. Nagle, I. A. Pless, J. K. Pope, N. T. Porile, C. A. Pruneau, M. S.Z. Rabin, J. D. Reid, A. Rimai, A. Rose, F. S. Rotondo, J. Sandweiss, R. P. Scharenberg, A. J. Slaughter, G. A. Smith, M. L. Tincknell, W. S. Toothacker, G. Van Buren, F. K. Wohn, Z. Xu

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Abstract

We present measurements from Brookhaven AGS Experiment 864 of neutron invariant multiplicity in 11.5A GeVlc Au+Pb collisions. The measurements span a rapidity range from center of mass to beam rapidity (ybeam = 3.2) and are presented as a function of event centrality. The results are compared with E864 measurements of proton invariant multiplicity and an average n/p ratio at hadronic freeze-out of 1.19±.08 is determined for the rapidity range y = 1.6 to y = 2.4. We discuss briefly the implications of this ratio within a simple equilibrium model of the collision system.

Original languageEnglish
Article number064903
Pages (from-to)649031-6490310
Number of pages5841280
JournalPhysical Review C - Nuclear Physics
Volume60
Issue number6
DOIs
StatePublished - Dec 1999
Externally publishedYes

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