$N^{\ast }(1920)(1/2^{+})$ state in the $NK\bar{K}$ system

Abstract

We study the three body $N\bar{K}K$ system by using the fixed center approximation to the Faddeev equations, taking the interaction between $N$ and $\bar{K}$, $N$ and $K$, and $\bar{K}$ and $K$ from the chiral unitary approach. Our results suggest that a $N\bar{K}K$ hadron state, with spin-parity $J^P=1/2^{+}$, and mass around 1920 MeV, can be formed.

Comments: Contribution to the proceedings of the 9th international workshop on the physics of excited nucleons (NSTAR2013), May 27-30, 2013, Peniscola, Spain