Study of $p\bar{\Lambda }$ and $p\bar{\Sigma }$ systems in constituent quark models

Abstract

The $p\bar{\Lambda }$ systems with J=0 and J=1 are dynamically investigated within the framework of two constituent quark models: the chiral quark model and the quark delocalization color screening model. The model parameters are taken from our previous work, which gave a good description of the proton-antiproton S-wave elastic scattering cross section experimental data. The $p\bar{\Lambda }$ elastic scattering processes with coupling to $p\bar{\Sigma }$ state are studied. The results show that, there is no s-wave bound state as indicated by an enhancement near the threshold of $p\bar{\Lambda }$ in $J/\psi$ decay. However, a $IJ=1/20$ $p\bar{\Sigma }$ resonance state is given in the quark delocalization color screening model.

7 pages, 3 figures

References in corpus (8)

• Nuclear Force from Lattice QCD
• Quark-model study of few-baryon systems
• Quark models of dibaryon resonances in nucleon-nucleon scattering
• $\Lambda NN$ and $\Sigma NN$ systems at threshold
• An alternative approach to the $\sigma$-meson-exchange in nucleon-nucleon interaction
• Observation of B- -> J/psi Lambda pbar and searches for B- -> J/psi Sigma0 pbar and B0 -> J/psi p pbar Decays
• Spectroscopy of ${\mathrm{q}}^3{\bar{\mathrm{q}}}^3$-States in Quark Model and Baryon-Antibaryon Enhancements
• Baryon Antibaryon Nonets

Cited by in corpus (2)

• Determination of Spin-parity Quantum Numbers for the Narrow Structure Near the $p\bar{\Lambda }$ Threshold in $e^{+}{e}^{-}\to p{K}^{-}\bar{\Lambda }+c.c.$
• Enhancement near the $\bar{p}\Lambda$ threshold in the ${\chi }_{c0}\to \bar{p}{K}^{+}\Lambda$ reaction