Physics – Nuclear Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dnp..l414l&link_type=abstract
American Physical Society, Division of Nuclear Physics Meeting, October 28-31, 1998 Santa Fe, New Mexico, abstract #L4.14
Physics
Nuclear Physics
Scientific paper
Nuclear fragment formation in the baryon-dense systems formed in collisions at beam energies below ~15 GeV/N is an extremely rich topic. The Relativisitic Heavy-Ion Collider (RHIC) is expected to form excited nuclear systems in central Au+Au collisions (100 GeV/N/beam) that are (at mid-rapidity) both baryon-poor and meson-dominated, implying a completely new regime for the study of fragment formation that should be no less rich. Calculations investigating (anti)fragment formation in Au+Au collisions at RHIC will be described. The multiplicity, rapidity, and transverse momentum distributions, as functions of the impact parameter, obtained for A=2 fragments when the events are obtained from the model RQMD 2.4 will be presented. The acceptance of the Solenoidal Tracker at RHIC (STAR) for these fragments is quite large. The (anti)deuteron invariant cross sections can be converted to apparent freeze-out radii via specific coalescence arguments.(W.J. Llope et al.), Phys. Rev. C 52, 2004 (1995). These apparent radii will compared to the actual average fragment formation radii obtained directly from the input events, which probes the applicability of this coalescence approach at RHIC. Preliminary work on similar calculations for triton and anti-triton production at RHIC will also be described.
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