Now showing items 1-10 of 16
QCD chiral symmetry restoration with a large number of quarks in a model with a confining propagator and dynamically massive gluons
(Elsevier B.V., 2015-05-11)
Considering a QCD chiral symmetry breaking model where the gap equation contains an effective confining propagator and a dressed gluon propagator with a dynamically generated mass, we verify that the chiral symmetry is ...
Chiral symmetry restoration and pion properties in a q-deformed NJL model
(Sociedade Brasileira de Física, 2006)
Chiral-symmetry restoration in clustered hadronic matter
Chiral-symmetry restoration is usually discussed in the context of quark matter, a system of deconfined quarks. However, many systems like stable nuclei and neutron stars have quarks confined within nucleons. In the present ...
Strong magnetic fields in nonlocal chiral quark models
(American Physical Society, 2017-12)
We study the behavior of strongly interacting matter under a uniform intense external magnetic field in the context of nonlocal extensions of the Polyakov-Nambu-Jona-Lasinio model. A detailed description of the formalism ...
Comparison between the continuum threshold and the Polyakov loop as deconfinement order parameters
(American Physical Society, 2017-02)
We study the relation between the continuum threshold s0 within finite energy sum rules and the trace of the Polyakov loop Φ in the framework of a nonlocal SU(2) chiral quark model, establishing a contact between both ...
Importance of asymptotic freedom for the pseudocritical temperature in magnetized quark matter
(Amer Physical Soc, 2014-08-11)
Although asymptotic freedom is an essential feature of QCD, it is absent in effective chiral quark models like the Nambu-Jona-Lasinio and linear sigma models. In this work we advocate that asymptotic freedom plays a key ...
Quark matter in a QCD Coulomb gauge quark model
(Sociedade Brasileira de Física, 2005-09-01)
In this communication we present results of a study of chiral symmetry in quark matter using an effective Coulomb gauge QCD Hamiltonian. QCD in Coulomb gauge is convenient for a variational approach based on a quasiparticle ...
A Comparative Analysis of In-Medium Spectral Functions for N(940) and N (au)(1535) in Real-Time Thermal Field Theory
In the real-time thermal field theory, the nucleon self-energy at finite temperature and density is evaluated where an extensive set of pion-baryon (pi B) loops are consider. On the other side, the in-medium self-energy ...
Is SAX J1808.4-3658 a Strange Star?
(American Physical Soc, 1999-11-08)
The possibility of strange stars is one of the most important issues in the study of compact objects. Here we use the observations of the newly discovered millisecond x-ray pulsar SAX J1808.4-3658 to constrain the radius ...
NOLEN-SCHIFFER ANOMALY AND RHO(0)-OMEGA MIXING
(Physical Soc Republic China, 1994-12-01)
The Nolen-Schiffer anomaly is the long standing discrepancy between theory and experiment of binding energy differences of mirror nuclei. It appears that the anomaly is largely explained by the charge symmetry breaking ...