LIGHT BARYON SPECTRUM IN A CHIRAL QUARK MODEL

1999 ◽  
Vol 08 (02) ◽  
pp. 159-166 ◽  
Author(s):  
HONG CHEN ◽  
JIANJUN YANG
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Energy Levels ◽  
Constituent Quark Model ◽  
Meson Exchange ◽  
Chiral Quark Model ◽  
Baryon Spectrum ◽  
Light Baryon

The contribution due to the chiral meson exchange to the energy levels of the light baryons is studied in the constituent quark model. The effects of different dynamical ingredients are discussed and the results with and without the chiral meson exchange are compared. Our calculation accommodates all confirmed states and indicates that the chiral meson exchange is indeed necessary to resolve some outstanding problems.

scholarly journals Understanding d*(2380) in a chiral quark model

2019 ◽  
Vol 199 ◽  
pp. 02017
Author(s):  
F. Huang ◽  
Y. B. Dong ◽  
P. N. Shen ◽  
Z. Y. Zhang
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Chiral Quark Model ◽  
Exotic State ◽  
Decay Properties ◽  
Decay Widths ◽  
Color Components ◽  
Good Agreement ◽  
Made In

We review our recent progresses made in the study of the structure and decay properties of the newly observed d*(2380) within a chiral constituent quark model. It is found that the d*(2380) can be explained as a compact hexaquark-dominated exotic state with a fraction of hidden color components of about 2/3 in its configuration. Based on this scenario the single- and double- pionic partial decay widths are calculated and the corresponding numerical results are in good agreement with the experimental data.

scholarly journals Spectroscopic Properties of Light Baryon

2022 ◽  
Vol 258 ◽  
pp. 03004
Author(s):  
Chandni Menapara ◽  
Ajay Kumar Rai
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Spectroscopic Properties ◽  
Constituent Quark Model ◽  
Hadron Spectroscopy ◽  
Quark Masses ◽  
Regge Trajectories ◽  
Light Baryon ◽  
Experimental Approaches ◽  
Linear Nature

Hadron Spectroscopy provides a realm to study the internal quark dynamics within the hadrons through phenomenological, theoretical as well as experimental approaches. In the present article, an attempt has been made to exploit the nucleon N resonances using a non-relativistic hypercentral Constituent Quark Model (hCQM). The properties are studied based on the linear nature of confining part of the potential. The 1S-5S, 1P-3P, 1D-2D and 1F states mostly with four star labelled resonances are explored again with the separation of charge states using different constituent quark masses. Also, Regge trajectories for some obtained states are plotted for examining the linear nature.

scholarly journals WHICH CONSTITUENT QUARK MODEL IS BETTER?

2003 ◽  
Vol 18 (02n06) ◽  
pp. 356-361 ◽  
Author(s):  
FAN WANG ◽  
JIA-LUN PING ◽  
HOU-RONG PANG ◽  
T. GOLDMAN
Keyword(s):  
Comparative Study ◽  
Quark Model ◽  
Hybrid Model ◽  
Constituent Quark ◽  
Goldstone Boson ◽  
Constituent Quark Model ◽  
Exchange Model ◽  
Meson Exchange ◽  
Boson Exchange ◽  
Quark Models

A comparative study has heen done by calculating the effective baryon-baryon interactions of the 64 lowest channels consisting of octet and decuplet baryons with three constituent quark models: the extended quark gluon exchange model, the Goldstone boson exchange model and the quark gluon meson exchange hybrid model. We find that these three models give similar results for 44 channels. Further tests of these models are discussed.

SPECTRUM OF BARYONS AND SPIN–ISOSPIN DEPENDENCE

2008 ◽  
Vol 23 (07) ◽  
pp. 527-537 ◽  
Author(s):  
H. HASSANABADI ◽  
A. A. RAJABI ◽  
S. ZARRINKAMAR
Keyword(s):  
Hyperfine Interaction ◽  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Baryon Spectrum ◽  
Goldstone Bosons ◽  
Dependent Part ◽  
Quark Potential ◽  
Baryon Spectroscopy ◽  
Isospin Dependence

The constituent quark model (CQM) has recently been widely used for the description of the internal structure of baryons. The baryon spectrum is usually well described, although various models are quite different. However, the study of baryon spectroscopy is not sufficient to distinguish among the various forms of quark dynamics. It would be interesting to consider the effect of an extra residual interaction among the quarks, which contains a dependence on isospin (or flavor). In the chiral constituent quark model the non-confining part of the potential is provided by the interaction with the Goldstone bosons, giving rise to a spin- and isospin-dependent part which is crucial for the description of the spectrum for energies lower than 1.7 GeV. In this work we have introduced an improved form of the hyperfine interaction and isospin dependent quark potential. The resulting description of the baryon spectrum was found to be satisfactory and we not only have included confinement potential at large separations, but also color charge and non-confining hyperfine interaction potentials. This combination of potentials yields spectra which are very close to the ones obtained in experiments.

scholarly journals Ω baryon spectrum and their decays in a constituent quark model

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
Ming-Sheng Liu ◽  
Kai-Lei Wang ◽  
Qi-Fang Lü ◽  
Xian-Hui Zhong
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Baryon Spectrum

Baryon spectrum in the chiral constituent quark model

2001 ◽  
Vol 63 (3) ◽  
Author(s):  
H. Garcilazo ◽  
A. Valcarce ◽  
F. Fernández
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Baryon Spectrum

MESON CLOUDS AND DRESSED CONSTITUENT QUARKS IN THE COMPLETE RG-IMPROVEMENT APPROACH

2008 ◽  
Vol 23 (31) ◽  
pp. 5037-5058 ◽  
Author(s):  
K. KESHAVARZIAN ◽  
A. MIRJALILI ◽  
M. M. YAZDANPANAH
Keyword(s):  
Quark Model ◽  
Free Parameter ◽  
Constituent Quark ◽  
Valence Quark ◽  
Constituent Quark Model ◽  
Chiral Quark Model ◽  
Splitting Function ◽  
Renormalization Scale ◽  
Sum Rule ◽  
Meson Cloud

Sea quark densities in the nucleon, based on the constituent quark model are analyzed. To model the asymmetry of these densities, the meson cloud or alternatively chiral quark model (χQM) is used. Valence quark densities of the meson which are required to extract the sea quark densities in the constituent quarks are obtained using the phenomenological valon model. In addition to the standard perturbative QCD approach which uses the [Formula: see text] scheme with a physical choice of renormalization scale, the calculations are also performed using the complete RG-improvement (CORGI) approach. To avoid a physically unacceptable Q2 behavior of the sea densities inside the constituent quarks, we assume that the free parameter which exists in the vertex function of the boson–quark splitting function, is Q2-dependent. Using the unsymmetrized sea densities of the nucleon which result from convoluting the constituent density in a nucleon with the quark density in the constituent quark, the Gottfried sum rule (GSR) is calculated using the standard perturbative and CORGI approaches. The CORGI result is closer to the reported experimental value for the GSR. The extracted sea and valence quark density in a nucleon, using χQM and also the CORGI approach, have been compared with available experimental data and what was obtained, based on χQM in the standard approach. This comparison confirms the anticipated better agreement of the CORGI approach with the data.

scholarly journals Low-lying configurations in a non-relativistic constituent quark model

2007 ◽  
Vol 34 (7) ◽  
pp. 1771-1782 ◽  
Author(s):  
W L Wang ◽  
F Huang ◽  
Z Y Zhang ◽  
Y W Yu ◽  
F Liu
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model
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