Hybrid stars in a relativistic quark model

Mitra, Gautam; Sahoo, Himanshu S.; Mishra, R. N.; Panda, P. K.

doi:10.1103/physrevc.105.045802

Cited by 3 publications

(2 citation statements)

References 78 publications

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“…Secondly, the expressions listed in current work can be applied to study for a baryon asysmmertric strongly magnetized hot quark matter. And to consider more microscopic interactions relevant for the medium, we can employ a power law parameterization for the momentum dependent relaxation time [88][89][90][91][92] in the derivation of longitudinal bulk viscous modified distribution function. We also can utilize various prescriptions to describe the string-like part of HQ potential to prove the robustness of the qualitative results in this work.…”

Section: Discussionmentioning

confidence: 99%

Responses of quark-antiquark interaction and heavy quark dynamics to magnetic field

Zhang¹

2023

Preprint

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We study how a magnetic field induced by colliding nuclei influences both heavy quark (HQ) potential and HQ momentum diffusion coefficients beyond the lowest Landau level approximation. By means of real-time hard thermal loop resummed technique combined with dimension two gluon condensate, the effective gluon propagator describing both perturbative and nonperturbative QCD nature at finite temperature and magnetic field are obtained. We find that HQ momentum diffusion coefficients in magnetized QCD medium become anisotropic, and with increasing temperature, the higher Landau levels become significant, which leads to the reduction of the anisotropic ratio (> 1) and even overturn the behavior (< 1) at high temperature. The nonperturbative (perturbative) contribution of HQ momentum diffusion coefficient in the low (high) temperature is dominant. And the anisotropy feature of the real part of the potential is essentially encoded in angular dependent Coulomb coupling and string tension. Whereas, the imaginary part of the potential from quark-loop in this work displays a significant anisotropy even though using the angular-independent Coulomb coupling and string tension. Furthermore, we study the magnetic response of viscous quark matter, which is manifested in the non-equilibrium distribution function of (anti-)quark by solving Boltzmann equation within the relaxation time approximation. We find the anisotropy ratio is almost insensitive to the magnetized bulk viscosity, although HQ momentum diffusion coefficient and HQ potential itself have visible changes.

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Section: Discussionmentioning

confidence: 99%

Responses of quark-antiquark interaction and heavy quark dynamics to magnetic field

Zhang¹

2023

Preprint

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“…The high temperatures achieved in heavy ion collisions provide the ideal environment for the formation of the quark-gluon plasma briefly after the collision, as the high energy enhances asymptotic freedom [8,9]. In compact stars, the high pressure environment may also favor a phase transition from hadronic to deconfined quark matter [10][11][12], so that the compact star can be either a hybrid hadron-quark or a pure quark star, if the Bodmer-Witten conjecture is satisfied [13][14][15][16][17][18][19]. The exact phase transition points at different temperatures remain unknown, since QCD is not exactly solvable from first principles and lattice QCD (LQCD) calculations have to deal with the sign problem and (so far) give accurate results only for the low chemical potential region [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Phase transitions and latent heat in magnetized matter

Pelicer¹,

Menezes²

2022

Preprint

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Based on the assumption that the QCD phase diagram gives a realistic picture of hadronic and quark matter under different regimes, it is possible to claim that a quark core may be present inside compact objects commonly named hybrid neutron stars or even that a pure strange star may exist. In this work we explore how the phase transition is modified by the presence of strong magnetic fields and how it is impacted by parameters of the quark phase, for which we use the MIT-model with vector interactions. The phase transition is assumed to conserve flavor when hadrons turn into deconfined quarks. The hadronic equation of state is calculated with the NL3ωρ * parametrization of quantum hadrodynamics. We find that the magnetic field slightly reduces the pressure and chemical potential of the phase transition and the latent heat, the latter being very model dependent.

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Phase transitions and latent heat in magnetized matter

Pelicer

Menezes

2022

Eur. Phys. J. A

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Hybrid stars in a relativistic quark model

Cited by 3 publications

References 78 publications

Responses of quark-antiquark interaction and heavy quark dynamics to magnetic field

Responses of quark-antiquark interaction and heavy quark dynamics to magnetic field

Phase transitions and latent heat in magnetized matter

Phase transitions and latent heat in magnetized matter

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