Measurements of Neutrons in 11.5 A GeV/c Au+Pb Heavy Ion Collisions

Details Measurements of Neutrons in 11.5 A GeV/c Au+Pb Heavy Ion Collisions Measurements of Neutrons in 11.5 A GeV/c Au+Pb Heavy Ion Collisions

1999-09-02

arxiv.org/abs/nucl-ex/9909001v1

Phys.Rev.C60:064903,1999

Physics

Nuclear Physics

Nuclear Experiment

21 pages, submitted to PRC

Scientific paper

10.1103/PhysRevC.60.064903

We present measurements from Brookhaven Experiment 864 of neutron invariant multiplicity in 11.5 A GeV/c Au+Pb collisions. The measurements span a rapidity range from center-of-mass to beam rapidity (y(beam)=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.

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