Enhanced antiproton production in Pb(160 AGeV)+Pb reactions: evidence for quark gluon matter?

Details Enhanced antiproton production in Pb(160 AGeV)+Pb reactions: evidence for quark gluon matter? Enhanced antiproton production in Pb(160 AGeV)+Pb reactions: evidence for quark gluon matter?

2000-04-06

arxiv.org/abs/hep-ph/0004045v1

Phys.Lett. B485 (2000) 133-138

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1016/S0370-2693(00)00643-2

The centrality dependence of the antiproton per participant ratio is studied in Pb(160 AGeV)+Pb reactions. Antiproton production in collisions of heavy nuclei at the CERN/SPS seems considerably enhanced as compared to conventional hadronic physics, given by the antiproton production rates in $pp$ and antiproton annihilation in $\bar{p}p$ reactions. This enhancement is consistent with the observation of strong in-medium effects in other hadronic observables and may be an indication of partial restoration of chiral symmetry.

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