Study of $p\barΛ$ and $p\barΣ$ systems in constituent quark models

Abstract

The $p\barΛ$ 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 $p\barΛ$ elastic scattering processes with coupling to $p\barΣ$ state are studied. The results show that, there is no s-wave bound state as indicated by an enhancement near the threshold of $p\barΛ$ in $J/ψ$ decay. However, a $IJ = {1/2}0$ $p\barΣ$ resonance state is given in the quark delocalization color screening model.

7 pages, 3 figures