Hyperon-nucleon interactions in a chiral SU(3) quark model

Zhang, Z. Y.; Yu, Yun-Wei; Shen, Peng-Nian; Dai, L. R.; Faessler, Amand; Sträub, U.

doi:10.1016/s0375-9474(97)00033-x

Cited by 184 publications

(227 citation statements)

References 24 publications

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“…In the present work we analyze the property of the one-gluon-exchange (OGE) interaction in ∆K states with L = 0 and our results show that the OGE interaction is attractive for I = 1 while repulsive for I = 2. When the model parameters are taken to be the same as in our previous work which successfully reproduced the NN phase shifts and the Y N cross sections [1,2], we find that the ∆K with L = 0 and I = 1 is a weakly bound state with the binding energy about 2 MeV in our present one-channel calculation.…”

Section: Introductionsupporting

confidence: 68%

“…In order to extend the study to the systems with strangeness, we generalized the idea of the SU(2) σ model to the flavor SU(3) case, in which a unified coupling between quarks and all scalar and pseudoscalar chiral fields is introduced and the constituent quark mass can be understood in principle as the consequence of spontaneous chiral symmetry breaking of the QCD vacuum [1]. With this generalization, the interacting Hamiltonian between quarks and chiral fields can be written as…”

Section: Formulation a The Modelmentioning

confidence: 99%

“…By generalizing the SU(2) linear σ model, a chiral SU(3) quark model is developed to describe the system with strangeness [1]. This model has been quite successful in reproducing the energies of the baryon ground states, the binding energy of deuteron, the nucleon-nucleon (NN) scattering phase shifts of different partial waves, and the hyperon-nucleon (Y N) cross sections by performing the resonating group method (RGM) calculations [1,2]. Recently this model has been extended to the systems with antiquarks to study the baryon-meson interactions and meson-meson interactions.…”

Section: Introductionmentioning

confidence: 99%

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NKandΔKstates in the chiralSU(

2004

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The isospin I = 0 and I = 1 kaon-nucleon S, P , D, F wave phase shifts are studied in the chiral SU(3) quark model by solving the resonating group method (RGM) equation. The calculated phase shifts for different partial waves are in agreement with the experimental data. Furthermore, the structures of the ∆K states with L = 0, I = 1 and I = 2 are investigated. We find that the interaction between ∆ and K in the case of L = 0, I = 1 is attractive, which is not like the situation of the N K system, where the S-wave interactions between N and K for both I = 0 and I = 1 are repulsive. Our numerical results also show that when the model parameters are taken to be the same as in our previous N N and Y N scattering calculations, the ∆K state with L = 0 and I = 1 is a weakly bound state with about 2 MeV binding energy, while the one with I = 2 is unbound in the present one-channel calculation.

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Section: Introductionsupporting

confidence: 68%

Section: Formulation a The Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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NKandΔKstates in the chiralSU(

2004

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“…Zhang et al extended this model to the three flavor case and named it as the chiral SU(3) quark model [354,355] …”

Section: Chiral Quark Modelmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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“…Because of the nonperturbative nature of strong interactions, previous theoretical investigations were based on either meson-exchange models or quark models, such as the Nijmegen meson-exchange model [3][4][5][6][7], the Jülich meson-exchange model [8,9], the Tübingen quark cluster model [10][11][12] , the chiral SU(3) quark model [13], the quark delocalization and color screening model [14], and the Kyoto-Niigata SU(6) quark cluster model [15,16].…”

Section: Introductionmentioning

confidence: 99%

StrangenessS=−1hyperon-nucleon scattering in covariant chiral effective field theory

Ren

Geng

et al. 2016

Phys. Rev. D

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Motivated by the successes of covariant baryon chiral perturbation theory in one-baryon systems and in heavy-light systems, we study relevance of relativistic effects in hyperon-nucleon interactions with strangeness S = −1. In this exploratory work, we follow the covariant framework developed by Epelbaum and Gegelia to calculate the Y N scattering amplitude at leading order. By fitting the five low-energy constants to the experimental data, we find that the cutoff dependence is mitigated, compared with the heavy-baryon approach. Nevertheless, the description of the experimental data remains quantitatively similar at leading order.

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Hyperon-nucleon interactions in a chiral SU(3) quark model

Cited by 184 publications

References 24 publications

NKandΔKstates in the chiralSU(

NKandΔKstates in the chiralSU(

The hidden-charm pentaquark and tetraquark states

StrangenessS=−1hyperon-nucleon scattering in covariant chiral effective field theory

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