%0 Journal Article
%T Exotic molecular meson states of B(*) K(*) nature
%A Oset, E.
%A Roca, L.
%J European Physical Journal C
%D 2022
%V 82
%N 10
%I Springer
%@ 1434-6044
%G English
%F Oset+Roca2022
%O WOS:000864656100003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5369), last updated on Mon, 17 Oct 2022 08:42:39 +0000
%X We evaluate theoretically the interaction of the open bottom and strange systems (B) over bar (K) over bar, (B) over bar * (K) over bar, (B) over bar (K) over bar * and (B) over bar* (K) over bar* 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 B *-> B gamma decay in the (B) over bar * (K) over bar channels, the K *-> K pi in the channels involving a K *, plus the box diagrams with (B) over bar (K) over bar and (B) over bar * (K) over bar intermediate states for the (B) over bar * (K) over bar * channels.
%R 10.1140/epjc/s10052-022-10850-8
%U https://arxiv.org/abs/2207.08538
%U https://doi.org/10.1140/epjc/s10052-022-10850-8
%P 882-9pp