Off-shell Effect of the Quark-model NN Interaction in the Nd Scattering

Fujiwara, Y.; Fukukawa, Kenji

doi:10.1007/s00601-012-0501-4

Cited by 6 publications

(4 citation statements)

References 113 publications

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“…Realistic quark-model (QM) interactions were proposed by Fujiwara et al [28], in which the qq interaction consists of a color analog of the FermiBreit interaction and an effective meson-exchange potential. The most recent model fss2 [29] reproduces the experimental data on the few-body systems (triton, hypertriton [30], and α particle [31] and nucleon-deuteron scattering [32]) fairly well without introducing TBFs. In this Letter, we present results for nuclear matter obtained with the QM force within the Bethe-Bruekner-Goldstone (BBG) many-body expansion up to the three hole-line level of approximation.…”

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confidence: 76%

“…Since the interactions are phase equivalent, the reason of the discrepancy must be due to the different off-shell behaviour of the QM interaction. In particular, this can be related to the characteristic nonlocality of the repulsive core [32] as produced by the quark exchange processes. Notice that the presence of non-locality not necessarily improves the saturation point [11].…”

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confidence: 99%

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Nuclear Matter from Effective Quark-Quark Interaction

Baldo

Fukukawa

2014

Phys. Rev. Lett.

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We study neutron matter and symmetric nuclear matter with the quark-meson model for the two-nucleon interaction. The Bethe-Bruckner-Goldstone many-body theory is used to describe the correlations up to the three hole-line approximation with no extra parameters. At variance with other nonrelativistic realistic interactions, the three hole-line contribution turns out to be non-negligible and to have a substantial saturation effect. The saturation point of nuclear matter, the compressibility, the symmetry energy, and its slope are within the phenomenological constraints. Since the interaction also reproduces fairly well the properties of the three-nucleon system, these results indicate that the explicit introduction of the quark degrees of freedom within the considered constituent quark model is expected to reduce the role of three-body forces.

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confidence: 76%

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Nuclear Matter from Effective Quark-Quark Interaction

Baldo

Fukukawa

2014

Phys. Rev. Lett.

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“…In this approach the quark degree of freedom is explicitly introduced and the nucleon-nucleon interaction is constructed from gluon and meson exchange between quarks, the latter being confined inside the nucleons. One of these quark models of the nucleon-nucleon interaction, named fss2 [37,38], is able to reproduce closely the experimental phase shifts and the few-body binding energies [38][39][40][41]. More recently it has been shown [42] that the fss2 interaction is able to reproduce also the correct nuclear matter saturation point without any additional parameter or need to introduce TBF.…”

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confidence: 99%

Nuclear matter equation of state from a quark-model nucleon-nucleon interaction

et al. 2015

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Starting from a realistic constituent quark model for the nucleon-nucleon interaction, we derive the equation of state (EOS) of nuclear matter within the Bethe-Brueckner-Goldstone approach up to three-hole-line level, without need to introduce three-nucleon forces. To estimate the uncertainty of the calculations both the gap and the continuous choices for the single-particle potential are considered and compared. The resultant EOS is compatible with the phenomenological analysis on the saturation point, the incompressibility, the symmetry energy at low density and its slope at saturation, together with the high-density pressure extracted from flow data on heavy ion collisions. Although the symmetry energy is appreciably larger in the gap choice in the high-density region, the maximum neutron star masses derived from the continuous-choice EOS and the gapchoice EOS are similar and close to two solar masses, which is again compatible with recent observational data. Comparison with other microscopic EOS is presented and discussed.

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“…Recently, it has been shown that the role of TBF is greatly reduced if the NN potential is based on a realistic constituent quark model [38,39] which can explain at the same time few-nucleon systems and nuclear matter, including the observational data on Neutron Stars and the experimental data on heavy-ions collisions. Moreover it has been found that at the highest densities the threehole-line diagrams can give a contribution larger than the two-hole-line diagrams, and this can be related to the characteristic nonlocality of the repulsive core [40] as produced by the quark-exchange processes.…”

Section: The Bhf and Dbhf Eos Of Nuclear Mattermentioning

confidence: 99%

Hybrid star structure with the Field Correlator Method

Burgio

Zappalà

2016

Eur. Phys. J. A

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We explore the relevance of the color-flavor locking phase in the equation of state (EoS) built with the Field Correlator Method (FCM) for the description of the quark matter core of hybrid stars. For the hadronic phase, we use the microscopic Brueckner-Hartree-Fock (BHF) many-body theory, and its relativistic counterpart, i.e. the Dirac-Brueckner (DBHF). We find that the main features of the phase transition are directly related to the values of the quark-antiquark potential V1, the gluon condensate G2 and the color-flavor superconducting gap ∆. We confirm that the mapping between the FCM and the CSS (constant speed of sound) parameterization holds true even in the case of paired quark matter. The inclusion of hyperons in the hadronic phase and its effect on the mass-radius relation of hybrid stars is also investigated.PACS. 25.75.Nq Quark deconfinement, quark-gluon plasma production, and phase transitions -26.60.-c Nuclear matter aspects of neutron stars -97.60.Jd Neutron stars

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Off-shell Effect of the Quark-model NN Interaction in the Nd Scattering

Cited by 6 publications

References 113 publications

Nuclear Matter from Effective Quark-Quark Interaction

Nuclear Matter from Effective Quark-Quark Interaction

Nuclear matter equation of state from a quark-model nucleon-nucleon interaction

Hybrid star structure with the Field Correlator Method

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