Treatment of baryonic resonances in the RQMD approach including scalar-vector mean fields
C. Fuchs, L. Sehn, Amand Faessler, D. S. Kosov, V. S. Uma Maheswari, Z. Wang
Abstract
In the relativistic Quantum Molecular Dynamics (RQMD) approach baryons are described within the framework of covariant hamilton constraint dynamics. The inclusion of a relativistic mean field results in a quasiparticle picture for the baryons. This requires to distinguish between canonical and kinetic variables of the particles. As resonances we include the Δ(1232) and the N*(1440) resonance. The resonance masses are distributed according Breit-Wigner functions. However, the scalar self energy leads to a shift in the masses and introduces an additional medium dependence. Consequences of this description on resonance and pion dynamics are discussed.
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