Treatment of baryonic resonances in the RQMD approach including scalar - vector mean fields

Fuchs, C.; Sehn, L.; Faessler, Amand; Kosov, D.S.; Uma Maheswari, V.S.; Wang, Z.

Treatment of baryonic resonances in the RQMD approach including scalar - vector mean fields

Jan, 1997

8 pages

Part of QCD phase transitions. Proceedings, 25th International Workshop on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg, Austria, January 13-18, 1997, 433-440

Contribution to:

25th International Workshop on Gross Properties of Nuclei and Nuclear Excitation: QCD Phase Transitions (Hirschegg 97), 433-440

e-Print:

nucl-th/9702028 [nucl-th]

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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

\Delta

(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.

talk: Hirschegg 1997/01/13
scattering: heavy ion
nuclear matter
transport theory
mean field approximation
Hamiltonian formalism: constraint
baryon resonance: mass
pseudoparticle
Delta(1232): mass
N(1440): mass

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