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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543259.0, MPI für Physik / MPI für Physik
Bose-Einstein correlations of pion pairs in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV
Authors:NA49 Collaboration; Alt, C.; Eckardt, V.; Schmitz, N.; Seyboth, P.; et al.
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Physical Review C
Journal Abbrev.:Phys.Rev.C
Issue / Number:77
Start Page:064908
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Measurements of Bose-Einstein correlations of pion pairs in central Pb+Pb collisions were performed with the NA49 detector at the CERN SPS for beam energies of 20A, 30A, 40A, 80A, and 158A GeV. Correlation functions were measured in the longitudinally co-moving ``out-side-long'' reference frame as a function of rapidity and transverse momentum in the forward hemisphere of the reaction. Radius and correlation strength parameters were obtained from fits of a Gaussian parametrization. The results show a decrease of the radius parameters with increasing transverse momentum characteristic of strong radial flow in the pion source. No striking dependence on pion-pair rapidity or beam energy is observed. Static and dynamic properties of the pion source are obtained from simultaneous fits with a blast-wave model to radius parameters and midrapidity transverse momentum spectra. Predictions of hydrodynamic and microscopic models of Pb+Pb collisions are discussed.
Classification / Thesaurus:NA49
Comment of the Author/Creator:22 pages, 23 figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2008-223
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:0709.4507
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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