On the possible existence of a \(S=-3\), \(I=1\) pentaquark

Abstract

In this exploratory work we analyze the possible existence of a strangeness \(S=-3\), isospin \(I=1\) pentaquark state \(P_{sss}\) generated dynamically from the \(\bar{K}\Xi \) interaction. We employ a unitarized scheme in coupled channels based on the chiral Lagrangian expanded up to next-to-leading order (NLO), and show that the inclusion of the NLO terms can be crucial to provide the necessary attraction that favors the existence of such triply strange pentaquark. The \(\bar{K}\Xi \) femtoscopic correlation functions are calculated as example of a possible experimental measurement in which a direct signal of the \(P_{sss}\) state could be observed.