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

  • 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 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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Author:Marcus BleicherORCiDGND, Mohamed Belkacem, Steffen A. BassORCiDGND, Sven SoffORCiD, Horst StöckerORCiDGND
Document Type:Preprint
Year of Completion:2000
Year of first Publication:2000
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/04/14
Source:http://de.arxiv.org/abs/hep-ph/0004045 , Report-no: LBNL-45444
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht