Regularizing thermo and magnetic contributions within nonrenormalizable theories

Avancini, S. S.; Farias, Ricardo L. S.; Pinto, Marcus Benghi; Restrepo, Tulio E.; Tavares, William R.

doi:10.1103/physrevd.103.056009

Cited by 26 publications

(32 citation statements)

References 68 publications

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“…This procedure, known as MFIR, shows remarkable agreement with LQCD [39, 52,71]. Therefore, some works adopt the MFIR scheme in the NJL model to obtain, for example, the thermodynamical properties for quark matter by computing quantities like pressure, entropy, heat capacity, sound velocity and magnetization, amongst other quantities [9,11,17,[76][77][78][79]. The MFIR method is also very useful to calculate the mesonic masses and its properties.…”

Section: Introductionmentioning

confidence: 99%

Magnetized pole-mass of neutral $ρ$ meson within full RPA evaluation

Avancini,

Farias,

Tavares

et al. 2022

Preprint

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Section: Introductionmentioning

confidence: 99%

Magnetized pole-mass of neutral $ρ$ meson within full RPA evaluation

Avancini,

Farias,

Tavares

et al. 2022

Preprint

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“…Several quantities are then predicted, as the magnetic catalysis effect (MC) [6][7][8] characterized by the increasing of the chiral condensate with the magnetic fields. This effect can alter many important quantities, as the pressure, sound velocity, heat capacity of the system [9][10][11][12] or even alter the pole-masses of light mesons [13][14][15][16][17][18][19][20][21][22]. There is also a possibility of such fields to alter significantly the measure of the elliptic flow 𝑣 2 as a direct result of the paramagnetic nature of QCD vacuum [12,23].…”

Section: Introductionmentioning

confidence: 99%

Effects of the quark anomalous magnetic moment in the chiral symmetry restoration: magnetic catalysis and inverse magnetic catalysis

Farias,

Tavares,

Nunes

et al. 2021

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In this work, we consider the effect of a constant anomalous magnetic moment (AMM) of quarks in the SU(2) Nambu-Jona-Lasinio model in the mean field approximation. To this end, we use the Schwinger ansatz, which represents a linear magnetic field term in the Lagrangian. A regularization method inspired in the vacuum magnetic regularization (VMR) is adopted to avoid ultraviolet divergences. Our results indicate a smooth decrease of the pseudocritical temperature and quark condensates for magnetic fields 𝐵 ≤ 0.1 GeV 2 when a sizable AMM is considered. We found only a small window for Inverse Magnetic Catalysis (IMC), in contradiction with NJL predictions made in the literature. For a low value of AMM, we observe for all ranges of magnetic fields considered that the pseudocritical temperature increases with the magnetic field, indicating only Magnetic Catalysis (MC). In our approach, for nonvanishing quark AMM, the chiral symmetry restoration happens always as a smooth crossover and never turns into a first order phase transition.

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“…Motivated by the running of the QCD coupling, one of the simplest modifications available consists of introducing a coupling constant that depends on the magnetic field (and in some cases also on the temperature) and can be fixed by fitting some LQCD results, such as the quark condensate or the chiral pseudocritical temperature. This strategy has shown that the NJL model can satisfactorily reproduce LQCD results in a broad range of temperature and magnetic fields [31][32][33][34][35][36]. In this regard, an interesting possibility was recently proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…An improvement within the MFIR scheme was recently suggested in Ref. [36] for the calculation of many mean-field observables.…”

Section: Introductionmentioning

confidence: 99%

Light pseudo-scalar meson masses under strong magnetic fields within the SU(3) Nambu-Jona-Lasinio model

Avancini,

Coppola,

Scoccola

et al. 2021

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We calculate the pole masses of pseudoscalar mesons in a strongly magnetized medium within the framework of the SU(3) Nambu-Jona-Lasinio model, using a magnetic fieldindependent regularization scheme. We employ both a constant and a magnetic fielddependent coupling G(B), the latter being fitted to reproduce lattice QCD results for the pseudocritical chiral transition temperature. Numerical results for the pole masses are obtained for definite parametrizations of the model. For neutral mesons, the use of G(B) provides closer agreement with lattice QCD results, which reveal a decrease of the mass with the external field. On the contrary, charged mesons masses are enhanced by B, showing no sign of the non-monotonous behavior found in recent lattice QCD simulations.

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Regularizing thermo and magnetic contributions within nonrenormalizable theories

Cited by 26 publications

References 68 publications

Magnetized pole-mass of neutral $ρ$ meson within full RPA evaluation

Magnetized pole-mass of neutral $ρ$ meson within full RPA evaluation

Effects of the quark anomalous magnetic moment in the chiral symmetry restoration: magnetic catalysis and inverse magnetic catalysis

Light pseudo-scalar meson masses under strong magnetic fields within the SU(3) Nambu-Jona-Lasinio model

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