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Lately, it has been suggested that strange (quark) stars can be responsible for glitches and other observational features of pulsars. Some discussions on whether quark stars, if really exist, are bare or crusted are also a source of…

Astrophysics · Physics 2009-11-13 D. P. Menezes , C. Providencia , D. B. Melrose

In this work, we have calculated some properties of the spin polarized strange quark matter (SQM) in a strong magnetic field at zero temperature using the MIT bag model. We have shown that the equation of state of spin polarized SQM is…

Solar and Stellar Astrophysics · Physics 2015-05-27 G. H. Bordbar , A. Peivand

Scaling relations with the bag constant parameter are investigated for Strange Quark Matter (SQM) stars in the presence of gravitationally strong magnetic fields minimally coupled with matter, considering both massless and massive strange…

High Energy Astrophysical Phenomena · Physics 2025-07-16 Łukasz Bratek , Joanna Jałocha , Marek Kutschera

We discuss the stability of strangelets by considering dynamical chiral symmetry breaking. For quark droplets of finite volume, we formulate the Nambu--Jona-Lasinio model with a basis set of the quark wave functions in the chiral bag model.…

High Energy Physics - Phenomenology · Physics 2009-11-11 S. Yasui , A. Hosaka

The quark antiquark components of the U(3) lightest scalar meson nonet are investigated by considering the Nambu-Jona-Lasinio model with flavor-dependent coupling constants that were derived by considering (non-perturbative) gluon…

High Energy Physics - Phenomenology · Physics 2023-08-02 Fabio L. Braghin

We review the stability of magnetized strange quark matter (MSQM) within the phenomenological MIT bag model, taking into account the variation of the relevant input parameters, namely, the strange quark mass, baryon density, magnetic field…

High Energy Astrophysical Phenomena · Physics 2015-05-18 A. Perez Martinez , R. Gonzalez Felipe , D. Manreza Paret

We investigate the existence and stability of highly-compact sub-stellar objects composed of strange quark matter (SQM), focusing on finite-size strangelets with baryon number $A \leq 100$. Motivated by the emergence of mass--radius…

High Energy Astrophysical Phenomena · Physics 2026-05-19 Jonathan Joás Zapata Campos , Rodrigo Negreiros

It is shown that the strange quark mass undergoes a first order transition in a generalized 3 flavor Nambu--Jona-Lasinio (NJL) Lagrangian which includes a complete set of explicit chiral symmetry breaking interactions. This transition…

High Energy Physics - Phenomenology · Physics 2014-11-13 J. Morais , J. Moreira , B. Hiller , A. H. Blin , A. A. Osipov

It is shown that strange quark matter (SQM) objects, stars, and planets, can very efficiently convert the mechanical energy into hadronic energy when they oscillate. This is because the mass density at the edge of SQM objects,…

High Energy Astrophysical Phenomena · Physics 2020-07-22 Marek Kutschera , Łukasz Bratek , Joanna Jałocha , Sebastian Kubis , Tomasz Kędziorek

Strange quark matter (SQM) may be the true ground state of matter. According to this SQM hypothesis, the observed neutron stars actually should all be strange quark stars. But distinguishing between neutron stars and strange quark stars by…

High Energy Astrophysical Phenomena · Physics 2021-10-01 Xu Wang , Yong-Feng Huang , Bing Li

We have investigated the structural properties of strange quark stars (SQSs) in a modified theory of gravity known as massive gravity. In order to obtain the equation of state (EOS) of strange quark matter, we have employed a modified…

General Relativity and Quantum Cosmology · Physics 2024-02-23 J. Sedaghat , B. Eslam Panah , R. Moradi , S. M. Zebarjad , G. H. Bordbar

The strange vector form factors are evaluated in the range between $Q^2=0$ and $Q^2=1\ \mbox{GeV}^2$ in the framework of the SU(3) chiral quark-soliton model (or semi-bosonized SU(3) Nambu-Jona-Lasinio model). The rotational $1/N_c$ and…

High Energy Physics - Phenomenology · Physics 2009-10-28 Hyun-Chul Kim , Teruaki Watabe , Klaus Goeke

The stability of strange quark matter is studied within the Nambu Jona-Lasinio model with three different parameter sets. The model Lagrangian contains 4-fermion (with and without vector interaction) and 6-fermion terms; the minimum energy…

High Energy Physics - Phenomenology · Physics 2010-12-17 C. Ratti

We investigate the rotating quark matter in the three-flavor Nambu and Jona-Lasinio (NJL) model. The chiral condensation, spin polarization and number susceptibility of the light and strange quarks are carefully studied at finite…

High Energy Physics - Phenomenology · Physics 2021-11-24 Fei Sun , Anping Huang

We compare the mass-radius relationship of strange stars obtained in two theoretical frameworks describing the color-flavor-locking state of dense quark matter: The semi-empirical MIT model and a self-consistent approach using the…

Nuclear Theory · Physics 2013-11-21 L Paulucci , E J Ferrer , J E Horvath , V de la Incera

The Strange Quark matter (SQM) hypothesis states that at extreme pressure and density conditions a new ground state of matter would arise, in which half of the \textit{down} quarks become strange quarks. If true, it would mean that at least…

High Energy Astrophysical Phenomena · Physics 2023-04-05 A. Bernardo , L. Paulucci , L. M. de Sá , J. E. Horvath

In the present work we are interested in understanding various properties of quark matter subject to strong magnetic fields described by the Nambu-Jona-Lasinio model with Polyakov loop. We start by analysing the differences arising from two…

We construct an equation of state of strange quark matter in strong magnetic field within a confining model. The confinement is modeled by means of the Richardson potential for quark-quark interaction modified suitably to account for strong…

High Energy Astrophysical Phenomena · Physics 2013-08-02 Monika Sinha , Xu-Guang Huang , Armen Sedrakian

The phase diagram of cold dense quark matter is studied using the 't Hooft extended Nambu--Jona-Lasinio Model applied to the light quark sector with a finite current mass for the strange quark (up and down are considered in the chiral…

High Energy Physics - Phenomenology · Physics 2016-02-17 J. Moreira , B. Hiller , A. A. Osipov , A. H. Blin

We numerically solve the transport equations for a quark gas described by the the Nambu-Jona-Lasinio model. The mean field equations of motion, which consist of the Vlasov equation for the density and the gap equation for the mean field,…

High Energy Physics - Phenomenology · Physics 2009-10-30 P. Rehberg , J. H"ufner