In-medium QMC model parameters and quark condensate in nuclear matter

1999 ◽  
Vol 25 (8) ◽  
pp. 1701-1711 ◽  
Author(s):  
Guo Hua
Keyword(s):  
Nuclear Matter ◽  
Quark Condensate ◽  
Model Parameters

scholarly journals Chiral Condensates in Quark and Nuclear Matter

2003 ◽  
Vol 18 (18) ◽  
pp. 3151-3174 ◽  
Author(s):  
G. X. Peng ◽  
H. C. Chiang ◽  
P. Z. Ning ◽  
U. Lombardo ◽  
M. Loewe
Keyword(s):  
Nuclear Matter ◽  
Quark Matter ◽  
Chiral Condensate ◽  
Quark Condensate ◽  
Model Parameters ◽  
Linear Extrapolation ◽  
Linear Behavior ◽  
Current Mass ◽  
Average Current ◽  
Model Independent

We present a novel treatment of calculating the in-medium quark condensates. The advantage of this approach is that one does not need to make further assumptions on the derivatives of model parameters with respect to the quark current mass. The normally accepted model-independent result in nuclear matter is naturally reproduced. The change of the quark condensate induced by interactions depends on the incompressibility of nuclear matter. When it is greater than 265 MeV, the density at which the condensate vanishes is higher than that from the linear extrapolation. For the chiral condensate in quark matter, a similar model-independent linear behavior is found at lower densities, which means that the decreasing speed of the condensate in quark matter is merely half of that in nuclear matter if the pion-nucleon sigma commutator is six times the average current mass of u and d quarks. The modification due to QCD-like interactions is found to slow the decreasing speed of the condensate, compared with the linear extrapolation.

Quark Clustering and Chiral Symmetry Breaking in Nuclear Matter

2003 ◽  
Vol 18 (32) ◽  
pp. 2255-2264 ◽  
Author(s):  
O. A. Battistel ◽  
G. Krein
Keyword(s):  
Symmetry Breaking ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Chiral Symmetry ◽  
Quark Matter ◽  
Traditional Approach ◽  
Chiral Symmetry Breaking ◽  
Quark Condensate ◽  
Baryon Density ◽  
Hadronic Matter

Chiral symmetry breaking at finite baryon density is usually discussed in the context of quark matter, i.e. a system of deconfined quarks. Many systems like stable nuclei and neutron stars however have quarks confined within nucleons. In this paper we construct a Fermi sea of three-quark nucleon clusters and investigate the change of the quark condensate as a function of baryon density. We study the effect of quark clustering on the in-medium quark condensate and compare results with the traditional approach of modeling hadronic matter in terms of a Fermi sea of deconfined quarks.

scholarly journals NATURALNESS IN AN EFFECTIVE FIELD THEORY FOR NEUTRON STAR MATTER

2004 ◽  
Vol 13 (07) ◽  
pp. 1413-1418 ◽  
Author(s):  
MOISÉS RAZEIRA ◽  
CÉSAR A. Z. VASCONCELLOS
Keyword(s):  
Field Theory ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Effective Field Theory ◽  
Mean Field ◽  
Effective Field ◽  
Hadronic Matter ◽  
Model Parameters ◽  
Static Properties ◽  
Naive Dimensional Analysis

High density hadronic matter is studied in a generalized relativistic multi-baryon Lagrangian density mean field approach which contains nonlinear couplings of the σ, ω, ϱ fields. We compare the predictions of our model with estimates obtained within a phenomenological naive dimensional analysis based on the naturalness of the coefficients of the theory. Upon adjusting the model parameters to describe bulk static properties of ordinary nuclear matter, we show that our approach represents a natural modelling of nuclear matter under the extreme conditions of density as the ones found in the interior of neutron stars. Moreover, we show that naturalness play a major role in effective field theory and, in combination with experiment, could represent a relevant criterium to select a model among others in the description of global static properties of neutron stars.

scholarly journals Quark condensate in nuclear matter based on nuclear Schwinger-Dyson formalism

1997 ◽  
Vol 55 (3) ◽  
pp. 1577-1579 ◽  
Author(s):  
Tomohiro Mitsumori ◽  
Nobuo Noda ◽  
Hiroaki Kouno ◽  
Akira Hasegawa ◽  
Masahiro Nakano
Keyword(s):  
Nuclear Matter ◽  
Quark Condensate

Effect of Nucleon Dynamics on the Scalar Quark Condensate in Nuclear Matter

2021 ◽  
Vol 85 (10) ◽  
pp. 1151-1154
Author(s):  
E. G. Drukarev ◽  
M. G. Ryskin ◽  
V. A. Sadovnikova
Keyword(s):  
Nuclear Matter ◽  
Quark Condensate ◽  
Scalar Quark

A CLASS OF NONLINEAR RELATIVISTIC MODELS FOR NUCLEAR MATTER AND THE BINARY PULSAR J0737-3039A

2007 ◽  
Vol 16 (02n03) ◽  
pp. 357-363
Author(s):  
MOISÉS RAZEIRA ◽  
CÉSAR A. Z. VASCONCELLOS ◽  
BARDO E. J. BODMANN ◽  
DIMITER HADJIMICHEF
Keyword(s):  
Nuclear Matter ◽  
Mean Field ◽  
Gravitational Theory ◽  
Model Parameters ◽  
Static Properties ◽  
Relativistic Field ◽  
Field Approach ◽  
Star Models ◽  
Dynamical Constraints ◽  
The Moment

In this work, we calculate the moment of inertia of the pulsar of the binary system J0737-3039A in the framework of Einstein's gravitational theory combined with a relativistic field theoretical approach for nuclear matter in the slow rotating regime, taking into account that the star's frequency is much smaller than Kepler's frequency. In the description of the EoS for nuclear matter, we consider a generalized class of relativistic multi-baryon Lagrangian density mean field approach which contains adjustable nonlinear couplings of the meson fields with the baryon fields. Upon adjusting the model parameters to describe bulk static properties of ordinary nuclear matter, we determine the EoS of the pulsars. By analyzing the results, dynamical constraints for neutron star models are identified.

scholarly journals Self-consistent treatment of the quark condensate and hadrons in nuclear matter

1999 ◽  
Vol 4 (2) ◽  
pp. 171-186 ◽  
Author(s):  
E.G. Drukarev ◽  
M.G. Ryskin ◽  
V.A. Sadovnikova
Keyword(s):  
Nuclear Matter ◽  
Quark Condensate ◽  
Self Consistent ◽  
Consistent Treatment
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