Heavy mesons in the Nambu—Jona-Lasinio model

Guo, Xiao-Yu; Chen, Xiaolin; Deng, Wubing

doi:10.1088/1674-1137/37/3/033102

Cited by 14 publications

(16 citation statements)

References 43 publications

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“…where K V is the NJL vector coupling constant and J (T ) V V represents the transverse vector loop integral [4,16]. The meson form factor will be modified to…”

Section: Vector-meson-dominance and Quark Loop Correctionmentioning

confidence: 99%

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Meson electro-magnetic form factors in an extended Nambu–Jona-Lasinio model including heavy quark flavors

2015

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Based on an extended NJL model including heavy quark flavors, we calculate the form factors of pseudo-scalar and vector mesons. After taking into account the vector-meson-dominance effect, which introduces a form factor correction to the quark vector coupling vertices, the form factors and electric radii of π + and K + pseudo-scalar mesons in the light flavor sector fit the experimental data well. The magnetic moments of the light vector mesons ρ + and K * + are comparable with other theoretical calculations. The form factors in the light-heavy flavor sector are presented to compare with future experiments or other theoretical calculations.

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“…where K V is the NJL vector coupling constant and J (T ) V V represents the transverse vector loop integral [4,16]. The meson form factor will be modified to…”

Section: Vector-meson-dominance and Quark Loop Correctionmentioning

confidence: 99%

“…To deal with both light and heavy mesons in the Nambu-Jona-Lasinio (NJL) model, in Ref. [16] the four-fermion point interactions are modified to…”

Section: A Extended Njl Modelmentioning

confidence: 99%

Meson electro-magnetic form factors in an extended Nambu–Jona-Lasinio model including heavy quark flavors

2015

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“…5 As an alternative approach, the heavy-light coupling constant in vacuum can be determined from the experimental values for D mesons in vacuum as in Refs. [19,[37][38][39]. However, in this work we do not use such parameters to focus on the QCD Kondo effect at finite density.…”

Section: Numerical Resultsmentioning

confidence: 99%

Interplay between chiral symmetry breaking and the QCD Kondo effect

Suzuki¹,

Yasui²,

Itakura³

2017

Phys. Rev. D

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We investigate the interplay between the (light-light quark) chiral condensate and heavy-light quark condensate induced by the QCD Kondo effect, which is described by an effective Lagrangian with four-point interactions and the mean-field approximation. We find that the appearance of Kondo condensates decreases the critical chemical potential of the chiral condensate. In the region near the critical chemical potential, a coexistence phase with two kinds of condensates can appear. The behavior of such an interplay at finite temperature and with nonzero current light-quark mass is also discussed.

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“…Furthermore, we use a four-point interaction between light and heavy fermions. Even if such a heavy-light four-point interaction may be regarded as an approximate form of the underlying interaction, it can be applied to nonperturbative physics such as strongly coupled heavy-light bound states (namely, mesons) [114][115][116][117] and the Kondo effect [30,33].…”

Section: Formulationmentioning

confidence: 99%

Kondo effect with Wilson fermions

Ishikawa,

Nakayama,

Suzuki

2021

Preprint

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We investigate the Kondo effect with Wilson fermions. This is based on a mean-field approach for the chiral Gross-Neveu model including four-point interactions between a light Wilson fermion and a heavy fermion. For massless Wilson fermions, we demonstrate the appearance of the Kondo effect. We point out that there is a coexistence phase with both the light-fermion scalar condensate and Kondo condensate, and the critical chemical potentials of the scalar condensate are shifted by the Kondo effect. For negative-mass Wilson fermions, we find that the Kondo effect is favored near the parameter region realizing the Aoki phase. Our findings will be useful for understanding the roles of heavy impurities in Dirac semimetals, topological insulators, and lattice QCD simulations.

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Heavy mesons in the Nambu—Jona-Lasinio model

Cited by 14 publications

References 43 publications

Meson electro-magnetic form factors in an extended Nambu–Jona-Lasinio model including heavy quark flavors

Meson electro-magnetic form factors in an extended Nambu–Jona-Lasinio model including heavy quark flavors

Interplay between chiral symmetry breaking and the QCD Kondo effect

Kondo effect with Wilson fermions

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