Propagation of mesons in asymmetric nuclear matter in a density-dependent coupling model |
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| Authors: | R Aguirre AL De Paoli |
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| Institution: | (1) Department of Physics, La Plata National University, C.C. 67 (1900) La Plata, Argentina, AR |
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| 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.
Received: 16 October 2001 / Accepted: 10 January 2002 |
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| Keywords: | 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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