Strange meson–nucleon states in the quark potential model

2006 
The quark potential model and resonating group method are used to investigate the bound states and/or resonances. The model potential consists of the t-channel and s-channel one-gluon exchange potentials and the confining potential with incorporating the QCD renormalization correction and the spin?orbital suppression effect in it. It was shown in our previous work that by considering the colour octet contribution, use of this model to investigate the KN low-energy elastic scattering leads to the results which are in pretty good agreement with the experimental data. In this paper, the same model and method are employed to calculate the masses of the bound systems. For this purpose, the resonating group equation is transformed into a standard Schr?dinger equation in which a nonlocal effective interaction potential is included. Solving the Schr?dinger equation by the variational method, we are able to reproduce the masses of some currently concerned states and get a view that these states possibly exist as molecular states. For the KN system, the same calculation gives no support to the existence of the resonance ?+(1540) which was announced recently.
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