Quantum chromodynamics axion in a hot and magnetized medium

Bandyopadhyay, Aritra; Farias, Ricardo L. S.; Lopes, Bruno S.; Ramos, Rudnei O.

doi:10.1103/physrevd.100.076021

Cited by 16 publications

(19 citation statements)

References 90 publications

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“…This behavior of the condensate with a/f a is similar to the results as obtained in NJL model in Ref. [67,68]. σ reaches its maximum value for a/f a = (2i + 1)π, for i = 0, 1, 2 ...etc and attains minimum for a/f a = 2iπ at all temperatures.…”

Section: A Vanishing Quark Chemical Potentialsupporting

confidence: 89%

“…Therefore the PNJL model is expected to describe QCD thermodynamics only within a limited range of temperature [88]. The previous studies of axion properties within the framework of the NJL model indicate that QCD transition significantly modifies axion mass and self coupling [67,68]. Axion mass and axion self-coupling decrease rapidly across the chiral transition temperature and there is a correlation between the quark-antiquark condensate and axion properties studied in this model.…”

Section: Introductionmentioning

confidence: 81%

“…[67] and Ref. [68] to study the axion mass and self-coupling at finite temperature in the absence as well as in the presence of a magnetic field. All these calculations show that near the chiral transition temperature the axion mass and self-coupling are significantly modified.…”

Section: Introductionmentioning

confidence: 99%

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In medium properties of axion within a Polyakov loop enhanced Nambu-Jona-Lasinio model

Das,

Mishra,

Mohapatra

2020

Preprint

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We estimate the axion properties i.e. its mass, topological susceptibility and the self-coupling within the framework of Polyakov loop enhanced Nambu-Jona-Lasinio (PNJL) model at finite temperature and quark chemical potential. PNJL model, where quarks couple simultaneously to the chiral condensate and to a background temporal quantum chromodynamics (QCD) gauge field, includes two important features of QCD phase transition, i.e. deconfinement and chiral symmetry restoration. The Polyakov loop in PNJL model plays an important role near the critical temperature. We have shown significant difference in the axion properties calculated in PNJL model compared to the same obtained using Nambu-Jona-Lasinio (NJL) model. We find that both the mass of the axion and its self-coupling are correlated with the chiral transition as well as the confinementdeconfinement transition. We have also estimated the axion properties at finite chemical potential. Across the QCD transition temperature and/or quark chemical potential axion mass and its selfcoupling also changes significantly. Since the PNJL model includes both the fermionic sector and the gauge fields, it can give reliable estimates of the axion properties, i.e. it's mass and the selfcoupling in a hot and dense QCD medium. We also compare our results with the lattice QCD results whenever available.

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Section: A Vanishing Quark Chemical Potentialsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 81%

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In medium properties of axion within a Polyakov loop enhanced Nambu-Jona-Lasinio model

Das,

Mishra,

Mohapatra

2020

Preprint

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“…[82] using lattice QCD simulations, and in Refs. [14,26,92] using perturbative calculations. Similar results are also obtained in Refs.…”

Section: Resultsmentioning

confidence: 99%

Thermomagnetic properties and Debye screening for magnetized quark-gluon plasma using the extended self-consistent quasiparticle model

Koothottil

Bannur

2020

Phys. Rev. C

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The thermomagnetic behavior of quark-gluon plasma has recently received a great deal of attention. In this work we make use of the extended self-consistent quasiparticle model to study the thermodynamic properties, magnetic response, and screening properties of magnetized (2+1)-flavor quark-gluon plasma (QGP). The system is considered as a noninteracting system of quasiparticles with masses depending on both temperature and magnetic fields. This allows us to obtain the equation of state of the system and other thermodynamic properties such as the speed of sound. We use the extended self-consistent model to obtain the magnetization and show that QGP has a paramagnetic nature. In addition, we study the pressure anisotropy and calculate the transverse pressure. The obtained anisotropic pressure may be used in hydrodynamic studies of magnetized QGP produced in heavy-ion collisions. We then study the total pressure in both directions, taking pure-field contributions into consideration. Finally we examine the screening properties of magnetized QGP in the longitudinal direction by calculating the Debye screening mass. We go on to compare our results for Debye mass with the results from other approaches.

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“…We advocate that to study physical quantities that are explicitly B dependent, such as the renormalized magnetization [32,40], apart from the incorporation of a thermomagnetic coupling, one also needs to adopt an adequate regularization prescription to avoid unphysical phenomena. A regularization method such as the well-known magnetic field independent regularization (MFIR) scheme [41][42][43][44][45][46][47][48][49][50][51][52][53], although adequate to describe chiral transitions, leads to unphysical predictions for M. The source of the problem is that in the MFIR scheme, one also subtracts mass independent divergent contributions (which explicitly depend on B) that are crucial for the regularization of M. To avoid this problem, Ref. [54] proposed a new regularization prescription, dubbed vacuum magnetic regularization (VMR).…”

Section: Introductionmentioning

confidence: 99%

Nambu--Jona-Lasinio $SU(3)$ model constrained by lattice QCD: thermomagnetic effects in the magnetization

Tavares,

Farias,

Avancini

et al. 2021

Preprint

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We use a three-flavor Nambu-Jona-Lasinio model to study the thermodynamics of strange quark matter under a strong magnetic field. The model Lagrangian features flavor SU(3) four-quark interactions and six-quark interactions that break the UA(1) symmetry. We incorporate thermomagnetic effects in the four-quark coupling. The model predicts magnetic catalysis at low temperatures and inverse magnetic catalysis at temperatures close to the pseudocritical temperature of the QCD transition, in agreement with lattice QCD results. We compute the pressure at the mean field level and obtain the magnetization of quark matter. We adopt the recently proposed vacuum magnetic regularization (VMR) scheme, in that divergent quark mass independent contributions are not subtracted, thereby avoiding unphysical results for the magnetization. We devote special attention to the renormalized magnetization, a projected quantity that allows for direct comparisons with lattice QCD simulations. Our results are in very good agreement with lattice data indicating a paramagnetic behavior for quark matter.

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Quantum chromodynamics axion in a hot and magnetized medium

Cited by 16 publications

References 90 publications

In medium properties of axion within a Polyakov loop enhanced Nambu-Jona-Lasinio model

In medium properties of axion within a Polyakov loop enhanced Nambu-Jona-Lasinio model

Thermomagnetic properties and Debye screening for magnetized quark-gluon plasma using the extended self-consistent quasiparticle model

Nambu--Jona-Lasinio $SU(3)$ model constrained by lattice QCD: thermomagnetic effects in the magnetization

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