Collective mechanism of dilepton production in high-energy nuclear collisions.

Collective bremsstrahlung of vector meson fields in relativistic nuclear collisions is studied within the time dependent Walecka model. Mutual deceleration of the colliding nuclei is described by introducing the e ective
Collective bremsstrahlung of vector meson fields in relativistic nuclear collisions is studied within the time dependent Walecka model. Mutual deceleration of the colliding nuclei is described by introducing the e ective stopping time and average rapidity loss of baryons. It is shown that electromagnetic decays of virtual ω mesons produced by bremsstrahlung mechanism can provide a substantial contribution to the soft dilepton yield at the SPS bombarding energies. In particular, it may be responsible for the dilepton enhancement observed in 160 AGev central Pb+Au collisions. Suggestions for future experiments to estimate the relative contribution of the collective mechanism are given.
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Metadaten
Author:Igor N. Mishustin, Leonid M. Satarov, Horst Stöcker, Walter Greiner
URN:urn:nbn:de:hebis:30-23295
Document Type:Preprint
Language:English
Date of Publication (online):2005/12/16
Year of first Publication:1997
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/12/16
Tag:Bremsstrahlung; Dilepton ; Kernkollision ; Walecka Modell
Walecka model ; bremsstrahlung; dilepton ; nuclear collisions
Source:J.Phys.G24:L17-L21,1998, http://arxiv.org/abs/hep-ph/9711271
HeBIS PPN:185296556
Institutes:Physik
Dewey Decimal Classification:530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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