$Z_{cs}^{+}$ production in the $B^{+}$ decays process

Abstract

In the present work, we studied the $Z_{cs}^{+}$ exotic state production in the $B^{+}$ meson decays through the meson loop mechanism, where the $B^{+}$ meson decays into an anti-charmed meson and a charmed-strange meson pair, and consequently couples to $Z_{cs}$ and a light meson ($\varphi ,{\rho }^0,\omega ,\eta ,{\eta }^{\prime }$, and ${\pi }^0$) via exchanging a proper charmed or charmed-strange meson. Using the effective Lagrangian approach, we estimated the branching fractions of different channels find them to be on the order of $10^{-4}$ and their ratios are almost independent of the model parameter. The fit fractions of $Z_{cs}^{+}$ in different $B^{+}$ decay processes are also estimated, and we propose searching for $Z_{cs}^{+}$ in the $B^{+}\to J/\psi K^{+}{\eta }^{\prime }$ process, which should be accessible to both Belle II and LHCb Collaborations.

Comments: 9 pages, 4 figures, 4 tables