14 research outputs found
QMC approach based on the Bogoliubov independent quark model of the nucleon
The quark-meson coupling model due to Guichon is formulated on the basis of
the independent quark model of the nucleon proposed by Bogoliubov and is
applied to the phenomenological descriptions of symmetric and asymmetric
nuclear matter. For symmetric matter, the model predicts, at saturation
density, the incompressibility MeV, the quark effective mass
MeV, and the effective nucleon mass where is
the nucleon mass in vacuum. Neutron star massesabove two solar masses are
obtained.Comment: submitted for publicatio
Borromean Binding of Three or Four Bosons
We estimate the ratio of the critical coupling constants
and which are required to achieve binding of 2 or 3 bosons,
respectively, with a short-range interaction, and examine how this ratio
depends on the shape of the potential. Simple monotonous potentials give
. A wide repulsive core pushes this ratio close to R=1. On the
other hand, for an attractive well protected by an external repulsive barrier,
the ratio approaches the rigorous lower bound . We also present results
for N=4 bosons, sketch the extension to , and discuss various
consequences.Comment: 12 pages, RevTeX, 5 Figures in tex include
Neutron stars within the Bogoliubov quark-meson coupling model
A quark-meson coupling model based on the quark model proposed by Bogoliubov
for the description of the quark dynamics is developed and applied to the
description of neutron stars. Starting from a su(3) symmetry approach, it is
shown that this symmetry has to be broken in order to satisfy the constraints
set by the hypernuclei and by neutron stars. The model is able to describe
observations such as two solar mass stars or the radius of canonical neutron
stars within the uncertainties presently accepted. If the optical potentials
for and hyperons in symmetric nuclear matter at saturation
obtained from laboratory measurements of hypernuclei properties are imposed the
model predicts no strangeness inside neutron stars.Comment: 14 pages, 4 figures, 1 table, revised and re submitted for
publication to Physical Review C journa