https://doi.org/10.1140/epja/s10050-022-00724-8
Letter
Update on strong and radiative decays of the 
and 
and their bottom cousins
1
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
2
School of Physical Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China
3
Institute for Nuclear Studies, Department of Physics, The George Washington University, 20052, Washington, DC, USA
4
Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
5
Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany
6
Tbilisi State University, 0186, Tbilisi, Georgia
Received:
25
November
2021
Accepted:
5
April
2022
Published online:
17
April
2022
The isospin breaking and radiative decay widths of the positive-parity charm-strange mesons, 
and 
, and their predicted bottom-strange counterparts, 
and 
, as hadronic molecules are revisited. This is necessary, since the and 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 and , and include the complete isospin breaking contributions up to next-to-leading order. With this we provide updated hadronic decay widths for all of , , and . Results for the partial widths of the radiative deays of and are also renewed in light of the much more precisely measured 
width. We find that 
and 
are the preferred channels for searching for 
and , respectively.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
