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

  • R. Aguirre
  • A.L. De Paoli
  • 30 Downloads

Abstract:

We study the propagation of the light mesons σ,ω,ρ, 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 β-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 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2002

Authors and Affiliations

  • R. Aguirre
    • 1
  • A.L. De Paoli
    • 1
  1. 1.Department of Physics, La Plata National University, C.C. 67 (1900) La Plata, ArgentinaAR

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