Enhanced antiproton production in Pb(160 A GeV)+Pb reactions: evidence forquark gluon matter?

Authors
Bleicher, M Belkacem, M Bass, SA Soff, S Stocker, H
Citation
M. Bleicher et al., Enhanced antiproton production in Pb(160 A GeV)+Pb reactions: evidence forquark gluon matter?, PHYS LETT B, 485(1-3), 2000, pp. 133-138
Citations number
38
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
485
Issue
1-3
Year of publication
2000
Pages
133 - 138
Database
ISI
SICI code
0370-2693(20000713)485:1-3<133:EAPIPA>2.0.ZU;2-K
Abstract
The centrality dependence of the antiproton per participant ratio is studie d in Pb(160 A GeV)+ Pb reactions. Antiproton production in collisions of he avy nuclei at the CERN/SPS seems considerably enhanced as compared to conve ntional hadronic physics, given by the antiproton production rates in pp an d antiproton annihilation in (p) over bar p reactions. This enhancement is consistent with the observation of strong in-medium effects in other hadron ic observables and may be an indication of partial restoration of chiral sy mmetry. (C) 2000 Published by Elsevier Science B.V.