2018 Impact factor 2.481
Hadrons and Nuclei


Eur. Phys. J. A 13, 501-515 (2002)
DOI: 10.1140/epja/iepja1308

Propagation of mesons in asymmetric nuclear matter in a density-dependent coupling model

R. Aguirre and A.L. De Paoli

Department of Physics, La Plata National University, C.C. 67 (1900) La Plata, Argentina

aguirre@venus.fisica.unlp.edu.ar

(Received: 16 October 2001 / Revised version: 10 January 2002 Communicated by V. Vento)

Abstract
We study the propagation of the light mesons $\sigma, \omega, \rho$, and a0(980) in dense hadronic matter in an extended derivative scalar coupling model. Within the scheme proposed it is possible to unambiguously define effective density-dependent couplings at the Lagrangian level. We first apply the model to study asymmetric nuclear matter with fixed isospin asymmetry, and then we pay particular attention to hypermatter in $\beta$-equilibrium. The equation of state and the potential contribution to the symmetry coefficient arising from the mean-field approximation are investigated.

PACS
21.30.Fe - Forces in hadronic systems and effective interactions.
21.65.+f - Nuclear matter.
12.40.Yx - Hadron mass models and calculations.
26.60.+c - Nuclear matter aspects of neutron stars.

© Società Italiana di Fisica, Springer-Verlag 2002