Intermediate mass dilepton spectra and the role of secondary hadronic processes in heavy ion collisions
Jul, 1998Citations per year
Abstract:
We carry out a study of intermediate-mass (between 1 and 2.5 GeV) dilepton spectra from hadronic interactions in heavy-ion collisions. The processes considered are , , , , , and . The elementary cross sections for those are obtained from chiral Lagrangians involving pseudoscalar, vector, and axial-vector mesons. The respective electromagnetic form factors are determined by fitting to experimental data for the reverse processes of . Based on this input we calculate cross sections and thermal dilepton emission rates and compare our results with those from other approaches. Finally we use these elementary cross sections with a relativistic transport model and calculate dilepton spectra in S+W collisions at SPS energies. The comparison of our results with experimental data from the HELIOS-3 collaboration indicates the importance of the secondary hadronic contributions to the intermediate-mass dilepton spectra.- scattering: heavy ion
- lepton: pair production
- mass spectrum: dilepton
- hadron hadron: exclusive reaction
- pseudoscalar meson
- vector meson
- effective Lagrangian: chiral
- form factor: electromagnetic
- electron positron: annihilation
- hadron: electroproduction
References(88)
Figures(0)