Dilepton production in nucleon-nucleon collisions reexamined

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.035203· OSTI ID:21199631

Shyam, R ^[1]; Mosel, U ^[2]

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1. Saha Institute of Nuclear Physics, Kolkata 700064 (India)
2. Institut fuer Theoretische Physik, Universitaet Giessen, D-35392 Giessen (Germany)

We present a fully relativistic and gauge-invariant framework for calculating the cross sections of dilepton production in nucleon-nucleon (NN) collisions that is based on the meson-exchange approximation for the NN-scattering amplitudes. Predictions of our model are compared with those of other covariant models that have been used earlier to describe this reaction. Our results are also compared with those of the semiclassical models that are employed to get the input elementary cross sections in the transport model calculations of the dilepton production in nucleus-nucleus collisions. It is found that cross sections obtained within the semiclassical and quantum mechanical models differ noticeably from each other.

• OSTI ID: 21199631
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 3; Other Information: DOI: 10.1103/PhysRevC.79.035203; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSON-EXCHANGE MODELS
COLLISIONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
FORECASTING
GAUGE INVARIANCE
LEPTONS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
QUANTUM MECHANICS
RELATIVISTIC RANGE
SCATTERING AMPLITUDES
SEMICLASSICAL APPROXIMATION
SIMULATION
TRANSPORT THEORY