Speaker
Description
The isospin breaking and radiative decay widths of the positive-parity charm-strange mesons, $D^{∗}_{s0}$ and $D_{s1}$, and their predicted bottom-strange counterparts, $B^{∗}_{s0}$ and $B_{s1}$, as hadronic molecules are revisited. This is necessary, since the $B^{∗}_{s0}$ and $B_{s1}$ masses used in (Cleven et al., Eur Phys J A 50:149, 2014) were too small, in conflict with the heavy quark flavour symmetry. Furthermore, not all isospin breaking contributions were considered. We here present a method to restore heavy quark flavour symmetry, correcting the masses of B∗s0 and Bs1, and include the complete isospin breaking contributions up to next-to-leading order. With this we provide updated hadronic decay widths for all of $D^{∗}_{s0}$, $D_{s1}$, $B^{∗}_{s0}$ and $B_{s1}$. Results for the partial widths of the radiative decays of $D^{∗}_{s0}(2317)$ and $D_{s1}(2460)$ are also renewed in light of the much more precisely measured $D^{∗}_{+}$ width. We find that $B_{s}\pi_{0}$ and $B_{s}\gamma$ are the preferred channels for searching for $B^{∗}_{s0}$ and $B_{s1}$, respectively.
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