Nambu<i>–</i>Jona-Lasinio model and charge independence

Henley, E.M.; Krein, G.

doi:10.1103/physrevlett.62.2586

Cited by 58 publications

(40 citation statements)

References 18 publications

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“…It is unclear whether this ansatz can be justified in QCD. Although it has been argued that many nuclear phenomena are connected to the partial chiral restoration in nuclear medium [21][22][23][24][25][26][27]33,34], the only compelling evidence for partial chiral symmetry restoration in nuclear medium is that the magnitude of the chiral quark condensate, qq , is substantially reduced relative to its vacuum value [35][36][37][38]. Recently, Birse [39] has argued that the in-medium nucleon mass cannot be simply related to the change in the chiral quark condensate and there are other important contributions unrelated to partial chiral symmetry restoration.…”

Section: Discussionmentioning

confidence: 99%

Modified quark-meson coupling model for nuclear matter

1996

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The quark-meson coupling model for nuclear matter, which describes nuclear matter as non-overlapping MIT bags bound by the self-consistent exchange of scalar and vector mesons, is modified by introducing medium modification of the bag constant. We model the density dependence of the bag constant in two different ways: one invokes a direct coupling of the bag constant to the scalar meson field, and the other relates the bag constant to the in-medium nucleon mass. Both models feature a decreasing bag constant with increasing density. We find that when the bag constant is significantly reduced in nuclear medium with respect to its free-space value, large canceling isoscalar Lorentz scalar and vector potentials for the nucleon in nuclear matter emerge naturally. Such potentials are comparable to those suggested by relativistic nuclear phenomenology and finite-density QCD sum rules. This suggests that the reduction of bag constant in nuclear medium may play an important role in low-and medium-energy nuclear physics.

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Section: Discussionmentioning

confidence: 99%

Modified quark-meson coupling model for nuclear matter

1996

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“…Hence, the shift caused by strong interactions is δm = 2.3 MeV). Henley and Krein [133] used the NJL model for the quarks with the finite values of the current masses. The calculated neutron-proton mass difference appeared to be strongly density dependent.…”

Section: Nolen-schiffer Anomalymentioning

confidence: 99%

QCD condensates and hadron parameters in nuclear matter: self-consistent treatment, sum rules and all that

Drukarev

Ryskin

Sadovnikova

2001

Progress in Particle and Nuclear Physics

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We review various approaches to the calculation of QCD condensates and of the nucleon characteristics in nuclear matter. We show the importance of their self-consistent treatment. The first steps in such treatment appeared to be very instructive. It is shown that the alleged pion condensation anyway can not take place earlier than the restoration of the chiral symmetry. We demonstrate how the finite density QCD sum rules for nucleons work and advocate their possible role in providing an additional bridge between the condensate and hadron physics.

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“…This is particularly the case for the Nolen-Schiffer anomaly [1] in mirror nuclei which may be explained by a change of the neutron-proton mass difference in the nuclear environment. Henley and Krein [2] argued that the NolenSchiffer anomaly can be resolved if the neutron-proton mass difference decreases rapidly in the medium. For this reason various approaches for calculating the neutron-proton mass difference in a dense nuclear environment have been proposed in the literature [3,4,5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Neutron-proton mass difference in nuclear matter

Meißner

Rakhimov

Wirzba³

et al. 2007

Eur. Phys. J. A

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Abstract. Isospin-breaking effects in nuclear matter are studied in the framework of a medium-modified Skyrme model. The proposed effective Lagrangian incorporates both the medium influence of the surrounding nuclear environment on the single nucleon properties and an explicit isospin-breaking effect in the mesonic sector. The approach predicts that the neutron-proton mass difference decreases in isospinsymmetric nuclear matter but by a very small amount only.

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Nambu–Jona-Lasinio model and charge independence

Cited by 58 publications

References 18 publications

Modified quark-meson coupling model for nuclear matter

Modified quark-meson coupling model for nuclear matter

QCD condensates and hadron parameters in nuclear matter: self-consistent treatment, sum rules and all that

Neutron-proton mass difference in nuclear matter

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