Radiative decays of the $(0^+,1^+)$ strange-bottom mesons

TL;DR

This paper calculates electromagnetic coupling constants for strange-bottom mesons and studies their radiative decay widths, suggesting experimental detection methods through specific invariant mass distributions.

Contribution

It provides the first calculation of electromagnetic couplings and decay widths for the $(0^+,1^+)$ strange-bottom mesons using light-cone QCD sum rules.

Findings

Decay widths are narrow, facilitating experimental detection.

Radiative decay channels are identified as promising search modes.

Electromagnetic couplings are quantitatively estimated.

Abstract

In this article, we assume that the $(0^+,1^+)$ strange-bottom mesons are the conventional $b\bar{s}$ mesons, and calculate the electromagnetic coupling constants $d$, $g_1$, $g_2$ and $g_3$ using the light-cone QCD sum rules. Then we study the radiative decays $B_{s0}\to B_s^* \gamma$, $B_{s1}\to B_s \gamma$, $B_{s1}\to B_s^* \gamma$ and $B_{s1}\to B_{s0} \gamma$, and observe that the widths are rather narrow. We can search for the $(0^+,1^+)$ strange-bottom mesons in the invariant $B_s \pi^0$ and $B^*_s \pi^0$ mass distributions in the strong decays or in the invariant $B_s^*\gamma$ and $B_s\gamma$ mass distributions in the radiative decays.