Two-loop corrections for nuclear matter in the Walecka model with form factors

1992 ◽  
Vol 46 (1) ◽  
pp. 188-194 ◽  
Author(s):  
R. Friedrich ◽  
K. Wehrberger ◽  
F. Beck
Keyword(s):  
Nuclear Matter ◽  
Form Factors ◽  
Walecka Model

Erratum: Two-loop corrections for nuclear matter in the Walecka model

1990 ◽  
Vol 41 (1) ◽  
pp. 404-404 ◽  
Author(s):  
R. J. Furnstahl ◽  
Robert J. Perry ◽  
Brian D. Serot
Keyword(s):  
Nuclear Matter ◽  
Walecka Model

scholarly journals Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and12C

2013 ◽  
Vol 87 (6) ◽  
Author(s):  
Myung-Ki Cheoun ◽  
Ki-Seok Choi ◽  
K. S. Kim ◽  
Koichi Saito ◽  
Toshitaka Kajino ◽  
...  
Keyword(s):  
Nuclear Matter ◽  
Neutral Current ◽  
Form Factors ◽  
Weak Form ◽  
Density Dependent ◽  
Neutrino Reaction

NEUTRON STAR MASS CORRELATION WITH SOUND VELOCITY AND INCOMPRESSIBILITY AT THE STAR CENTER IN THE POLYTROPIC APPROXIMATION

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1575-1582
Author(s):  
L. FERRARI ◽  
P. C. R. ROSSI ◽  
M. MALHEIRO
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Nuclear Matter ◽  
Sound Velocity ◽  
Mean Field ◽  
Star Mass ◽  
Mean Field Models ◽  
Neutron Star Mass ◽  
Analytic Expressions ◽  
Walecka Model

In this paper we use a polytropic approximation to the equation of state for the interior of neutrons stars, described by relativistic hadronic mean field models. In this approximation, it is possible to obtain analytic expressions for the sound velocity and the incompressibility at the star center. We found a correlation between these quantities and the star mass. Using two well-known parametrizations of the nonlinear Walecka model for nuclear matter composed only of protons, neutrons and electron in β equilibrium, we obtain for a star mass of 1.43 M⊙ a central incompressibility Kc = (3000±100), around ten times the nuclear matter incompressibility, and a central sound velocity (v/c)2 ~ 0.3.

scholarly journals Energy–momentum tensor form factors of the nucleon in nuclear matter

2012 ◽  
Vol 718 (2) ◽  
pp. 625-631 ◽  
Author(s):  
Hyun-Chul Kim ◽  
Peter Schweitzer ◽  
Ulugbek Yakhshiev
Keyword(s):  
Nuclear Matter ◽  
Energy Momentum Tensor ◽  
Form Factors ◽  
Momentum Tensor ◽  
Tensor Form

POINT-COUPLING AND NONLINEAR WALECKA MODELS CONNECTION

2007 ◽  
Vol 16 (09) ◽  
pp. 3037-3040 ◽  
Author(s):  
O. LOURENÇO ◽  
M. DUTRA ◽  
A. DELFINO ◽  
R. L. P. G. AMARAL
Keyword(s):  
Nuclear Matter ◽  
Equations Of State ◽  
Mean Field ◽  
Coupling Model ◽  
Equation Of States ◽  
Theoretical Support ◽  
Naive Dimensional Analysis ◽  
Spectra Properties ◽  
Finite Nuclei ◽  
Walecka Model

In the context of infinite nuclear matter, the equation of states obtained from the Walecka model turn out to be the same as those constructed from point-coupling models in which the nucleons interact with each other only when they are in contact.1 Nonlinear point-coupling models have been applied sucessfully to describe infinite nuclear matter and finite nuclei spectra properties.2 A theoretical support for this was presented on the basis of naturalness and naive dimensional analysis.3 For the usual linear Walecka model the infinite meson masses limit leads to a point-coupling model. From this, a quite natural question arises, whether the same kind of masses limit taken in a nonlinear Walecka model would provide a point-coupling model. We construct a modified nonlinear Walecka model Lagrangian in which the infinite meson masses limit can be taken exactly and leads to the contact nonlinear model. This modified nonlinear Walecka model includes higher order couplings. Although the modified and the nonlinear Walecka model at a mean field approach lead to distinct equations of state, the physically relevant content of the models are the same.

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