Dilepton production at intermediate-energy heavy-ion collisions
- Institut fuer Theoretische Physik, Universitaet Giessen, D-6300 Giessen, Germany (DE)
Dilepton production is studied in heavy-ion collisions at bombarding energies from 60 to 400 MeV/nucleon. The dynamical evolution of the nucleus-nucleus collisions is described by a transport equation of the Vlasov-Uehling-Uhlenbeck type including explicitly pion and {Delta}(1232) degrees of freedom and considering free on-shell production processes. We calculate the contribution of proton-neutron bremsstrahlung, {pi}{sup 0} and {Delta} Dalitz decay, and {pi}{sup +}{pi}{sup {minus}} annihilation. At 60 MeV/nucleon bombarding energy proton-neutron bremsstrahlung dominates while around 100 MeV/nucleon most of the {ital e}{sup +}{ital e{minus}} cross section arises from {pi}{sup 0} decay. At 400 MeV/nucleon, however, the {Delta} Dalitz decay is the most important dilepton source for invariant masses {ital M}{gt}140 MeV thus offfering the possibility to study in-medium properties of this resonance.
- OSTI ID:
- 5712106
- Journal Information:
- Physical Review, C (Nuclear Physics); (USA), Vol. 43:4; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALCIUM 40 REACTIONS
PAIR PRODUCTION
CALCIUM 40 TARGET
LEPTONS
BREMSSTRAHLUNG
CROSS SECTIONS
DELTA-1232 BARYONS
GEV RANGE 01-10
GEV RANGE 10-100
HEAVY ION REACTIONS
ISOSPIN
PROTON-NEUTRON INTERACTIONS
BARYON-BARYON INTERACTIONS
BARYONS
CHARGED-PARTICLE REACTIONS
DELTA BARYONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
N BARYONS
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PROTON-NUCLEON INTERACTIONS
RADIATIONS
TARGETS
653003* - Nuclear Theory- Nuclear Reactions & Scattering