Production of hidden-charm molecular candidates with hidden strangeness in $B_s^0$ decays

Abstract

We study the production of spin-one $D_{s0}^*(2317)\bar D_s^*$, $D_{s1}(2460)\bar D_s^*$, and $D_{s1}(2536)\bar D_s^*$ molecular candidates in $B_s^0$ decays with an accompanying $η$, providing a complementary probe of their structure and production mechanisms. The meson-loop rescattering amplitudes are constructed from factorized weak sources and heavy-hadron chiral interactions. Constituent couplings are estimated using threshold-dependent compositeness relations, and the associated input uncertainties are propagated to the predicted rates. Opposite-$C$-parity partner hypotheses are included with inherited benchmark parameters. We calculate the branching fractions for two relative signs. Over the cutoff range $2\leqα\leq5$, the larger central branching fractions reach several $10^{-6}$ to several $10^{-5}$, suggesting potential accessibility in future experimental measurements.