The $B^{(*)}\bar{K}^{(*)}$-coupled-channel system in the hidden-gauge approach

TL;DR

This paper predicts bottom-strange molecular states using the Hidden Gauge Formalism, identifying potential new states and interpreting recent LHCb observations as molecular states.

Contribution

It provides novel predictions for bottom-strange molecular states and interprets recent experimental signals as molecular states within a coupled-channel framework.

Findings

Predicted masses for bottom-strange partners of known states.

Identified LHCb states as potential molecular states.

Fixed one parameter to match an observed excited state.

Abstract

In this work we provide predictions for bottom-strange molecular states within the Hidden Gauge Formalism. We study the coupled-channel scattering of $B^{(*)}\bar{K}^{(*)}$ states and, by fixing only one free parameter to obtain the mass of a new excited $B_s^0$ state seen by the LHCb, we predict the pole parameters of six states in this sector. Concretely, we get that the masses of the flavor partners of the $D_{s0}(2317)$ and $D_{s1}(2460)$ states in the bottom sector are $5760$ and $5802$ MeV for the $B\bar{K}$ ($J^P=0^+$) and $B^{*}\bar{K}$ ($1^+$) states, respectively. Moreover, the recently seen states by the LHCb with masses around $6100$ and $6160$ MeV can be interpreted as $B\bar{K}^*$ and $B^*\bar{K}^*$ molecular states, according to reasonable values of the pole parameters and the splitting between these two states obtained in our calculation.