https://doi.org/10.1140/epjc/s10052-022-10850-8
Regular Article - Theoretical Physics
Exotic molecular meson states of 
nature
1
Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, Aptdo.22085, 46071, Valencia, Spain
2
Departamento de Física, Universidad de Murcia, 30100, Murcia, Spain
Received:
30
August
2022
Accepted:
25
September
2022
Published online:
6
October
2022
We evaluate theoretically the interaction of the open bottom and strange systems 
, 
, 
and 
to look for possible bound states which could correspond to exotic non-quark–antiquark mesons since they would contain at least one b and one s quarks. The s-wave scattering matrix is evaluated implementing unitarity by means of the Bethe–Salpeter equation, with the potential kernels obtained from contact and vector meson exchange mechanisms. The vertices needed are supplied from Lagrangians derived from suitable extensions of the hidden gauge symmetry approach to the bottom sector. We find poles below the respective thresholds for isospin 0 interaction and evaluate the widths of the different obtained states by including the main sources of imaginary part, which are the 
decay in the channels, the 
in the channels involving a 
, plus the box diagrams with and intermediate states for the channels.
An erratum to this article is available online at https://doi.org/10.1140/epjc/s10052-022-10999-2.
© The Author(s) 2022
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