A chiral quark model analysis of the $\bar{K}N$ interaction

Abstract

In this work we analyze the $\bar{K}N$ interaction in the framework of a constituent quark model. The near-threshold elastic and charge exchange cross sections are evaluated, finding a good agreement with the experimental data. Furthermore, the possible existence of $\bar{K}N$ bound states are explored, finding two poles in the isoscalar $J^P={\frac{1}{2}}^{-}$ sector that can be interpreted as the experimental $\Lambda (1405)$ state.

Comments: 7 pages, 2 figures, 3 tables