Regeneration of Anti-Protons in Ultrarelativistic Heavy-Ion Collisions

Details Regeneration of Anti-Protons in Ultrarelativistic Heavy-Ion Collisions Regeneration of Anti-Protons in Ultrarelativistic Heavy-Ion Collisions

2001-04-01

arxiv.org/abs/hep-ph/0104006v1

Nucl.Phys. A698 (2002) 587-590

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages ReVTeX incl. 4 ps-figs and espcrc1.sty, contribution to the proceedings of Quark Matter 2001

Scientific paper

10.1016/S0375-9474(01)01434-8

The production and annihilation of antiprotons in the hadronic phase of heavy-ion collisions is evaluated within a thermal equilibrium approach. It is shown that the inverse reaction of $p\bar p$ annihilation (i.e., multi-pion annihilation $N_\pi \pi\to p\bar p$ with $N_\pi\simeq$~5-7) in connection with oversaturation of pion phase space (i.e., finite pion chemical potentials) plays an important role in understanding the observed antiproton yields at SpS energies within the standard picture of subsequent chemical and thermal freezeout. Implications for RHIC energies are also addressed.

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