Chiral shifts in heavy-light mesons

TL;DR

This paper calculates the mass shifts of heavy-light mesons due to channel coupling, predicting significant shifts for certain states and providing mass predictions for others, advancing understanding of meson spectroscopy.

Contribution

It introduces a parameter-free coupling channel model to compute mass shifts in heavy-light mesons, offering new predictions for $B_s$ meson states.

Findings

Strong downward mass shifts for $0^+$ and ${1^+}'$ states

Minimal shifts for ${1^+}

Predicted masses for $0^+$ and ${1^+}'$ states of $B_s$ mesons

Abstract

The mass shifts of the $P$-wave $D_s$ and $B_s$ mesons due to coupling to $DK$ and $BK$ channels are calculated in the coupling channel model without fitting parameters. The strong mass shifts down for $0^+$ and ${1^+}'$ states have been obtained, while ${1^+}"$ and $2^+$ states remain almost in situ. The masses of $0^+$ and ${1^+}'$ states of $B_s$ mesons have been predicted.