Hadronic expansion dynamics in central Pb+Pb collisions at 158 GeV per nucleon

Journal Article · Tue Mar 24 00:00:00 EST 1998 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1007/s100529800866· OSTI ID:1407015

Appelshäuser, H. ^[1]

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1. Gesellschaft fur Schwerionenforschung (GSI), Darmstadt (Germany). et al.

Two-particle correlation functions of negative hadrons over wide phase space, and transverse mass spectra of negative hadrons and deuterons near mid-rapidity have been measured in central Pb+Pb collisions at 158 GeV per nucleon by the NA49 experiment at the CERN SPS. A novel Coulomb correction procedure for the negative two-particle correlations is employed making use of the measured oppositely charged particle correlation. Within an expanding source scenario these results are used to extract the dynamic characteristics of the hadronic source, resolving the ambiguities between the temperature and transverse expansion velocity of the source, that are unavoidable when single and two particle spectra are analysed separately. Lastly, the source shape, the total duration of the source expansion, the duration of particle emission, the freeze-out temperature and the longitudinal and transverse expansion velocities are deduced.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: NA49 Collaboration
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1407015
• Journal Information: European Physical Journal. C, Particles and Fields, Vol. 2, Issue 4; ISSN 1434-6044
• Publisher: Springer
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS