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Title: Optimization of relativistic mean field model for finite nuclei to neutron star matter
Authors: Agrawal, B.K.
Sulaksono, Anto
Reinhard, P.-G.
Keywords: Relativistic mean-field model
Dense matter
Neutron stars
Issue Date: Mar-2012
Publisher: Elsevier
Series/Report no.: Volume 882;Pages 1–20
Abstract: We have optimized the parameters of extended relativistic mean-field model using a selected set of global observables which includes binding energies and charge radii for nuclei along several isotopic and isotonic chains and the iso-scalar giant monopole resonance energies for the 90Zr and 208Pb nuclei. The model parameters are further constrained by the available informations on the energy per neutron for the dilute neutron matter and bounds on the equations of state of the symmetric and asymmetric nuclear matter at supra-nuclear densities. Two new parameter sets BSP and IUFSU* are obtained, later one being the variant of recently proposed IUFSU parameter set. The BSP parametrization uses the contributions from the quartic order cross-coupling between ω and σ mesons to model the high density behaviour of the equation of state instead of the ω meson self-coupling as in the case of IUFSU* or IUFSU. Our parameter sets yield appreciable improvements in the binding energy systematics and the equation of state for the dilute neutron matter. The importance of the quartic order ω–σ cross coupling term of the extended RMF model, as often ignored, is realized.
ISSN: 3759474
Appears in Collections:Journal Collection

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