ETA and dilepton production in heavy-ion reactions

G. Wolf, W. Cassing, W. Ehehalt, U. Mosel

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We present a nonperturbative dynamical study of η-meson and pion production in heavy-ion collisions from 1 to 2 GeV/A bombarding energy. The dynamical evolution of the nucleus-nucleus collision is described by a transport equation of the Boltzmann-Uehling-Uhlenbeck type evolving phase-space distribution functions for nucleons, Δ's, N(1440)'s, N(1535)'s, pions and η's with their isospin degrees of freedom. We also study the effect of pion and Δ selfenergies on the pion dynamics. Though quite substantial medium modifications are incorporated, the pion spectra and yields show only a weak sensitivity on the in-medium effects. Furthermore, we present results for differential dilepton yields in heavy-ion collisions at bombarding energies of 1 and 2 GeV/A incorporating all known sources for dilepton production. We investigate in particular the sensitivity of the calculated yields to predicted changes of the ρ meson in dense matter and discuss the feasibility to measure the time-like electromagnetic form factor of hadrons and their medium-dependence through the observation of dileptons.

Original languageEnglish
Pages (from-to)273-295
Number of pages23
JournalProgress in Particle and Nuclear Physics
Volume30
Issue numberC
DOIs
Publication statusPublished - 1993

Fingerprint

heavy ions
pions
ionic collisions
mesons
nuclei
sensitivity
nucleons
hadrons
form factors
degrees of freedom
distribution functions
electromagnetism
collisions
energy

Keywords

  • Dilepton
  • electromagnetic form factors
  • eta
  • medium properties
  • pion
  • rho-meson

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

ETA and dilepton production in heavy-ion reactions. / Wolf, G.; Cassing, W.; Ehehalt, W.; Mosel, U.

In: Progress in Particle and Nuclear Physics, Vol. 30, No. C, 1993, p. 273-295.

Research output: Contribution to journalArticle

Wolf, G. ; Cassing, W. ; Ehehalt, W. ; Mosel, U. / ETA and dilepton production in heavy-ion reactions. In: Progress in Particle and Nuclear Physics. 1993 ; Vol. 30, No. C. pp. 273-295.
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