[en] Short communication

[en] The authors investigate the binding energy of six-quark systems with strangeness s = -3 under the constituent quark model in the framework of RGM. The single NΩ channel with spin S = 2 and the single ΔΩ channel with spin S = 3 are considered, respectively. The results show that both two systems can form loosely bound states: the binding energies are ranged from 3.5-12.7 MeV for NΩ and 4.4-14.2 MeV for ΔΩ system, respectively

[en] The binding energy of the six quark system with strangeness s = -5 is investigated by the SU(3) chiral constituent quark model. the single Ξ*Ω channel calculation with spin S = 0 and the coupled ΞΩ-Ξ*Ω channel calculation with spin S = 1 are considered. It is shown that in the spin S = 0 case, the binding energy of Ξ*Ω is ranged from 80.0 to 92.4 MeV, while in the S = 1 case, the additional Ξ*Ω channel increases the binding energy of ΞΩ to a range of 26.2-32.9 MeV

[en] Published in summary form only

[en] The effective two-meson-exchange potential with regard to the box diagram in the N-N interaction has been derived by virtue of the one-gluon-exchange quark-antiquark pair creation model. The result shows that the general feature of this effective potential agrees with that of the phenomenological σ-meson exchange potential in coordinate space

[en] Decay rates of ρ-meson into two π mesons and K^* into Kπ mesons are calculated by using the One-Gluon-Exchange Quark-Antiquark pair creation model. The results are in agreement with the experimental data

[en] A more realistic non-relativistic quark-quark potential in the thermal and dense medium is proposed and used to study the leptonic decay of J/Ψ. The leptonic decay property of J/Ψ in the hot and dense matter depends on the form of the binding potential. The decay width in this potential case is much sensitive to the temperature than that in the Karsch's potential case, especially in the lower temperature region. In both cases, the decay widths decreased with the increasing temperature and density. The resultant critical temperature of 200 MeV is consistent with the lattice quantum chromodynamics finding

[en] The energy spectra of heavy quark bound states are analyzed using the error-function-type potential and the one-gluon-exchange Coulomb-type force. The Debye screening mass at finite temperature and density is studied in the thermofield dynamics approach. The critical temperature and critical energy density for J/ψ dissociation in hot and dense matter are obtained

[en] The coupling effect of (NΔ) channel on the N-N scattering is studied by solving a coupled channel RGM (Resonating Group Method) equation in the quark-SU(3) chiral model. The results indicate that the coupling between ¹S₀(NN) and ⁵D₀(NΔ) is important in explaining the NN ¹S₀ phase shifts, and the influence of the (NΔ) channel coupling to the N-N higher partial wave scattering is small

[en] The S wave phase shifts of N-N scattering are calculated by using the equivalent one meson exchange potential (EOMEP) and equivalent 2 π exchange potential (ETPEP) from the quark-antiquark pair creation model. The result shows the EOMEP and ETPEP can provide a part of medium attractive nature of the nuclear force