Eur. Phys. J. C (2023) 83: 258
https://doi.org/10.1140/epjc/s10052-023-11408-y

Regular Article - Theoretical Physics

Searching for doubly charmed tetraquark candidates $T_{\mathit{cc}}$ and $T_{cc\overline{s}}$ in $B_c$ decays

Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 300350, Tianjin, China

^c xiaohai.liu@tju.edu.cn

Received: 7 February 2023
Accepted: 14 March 2023
Published online: 28 March 2023

Abstract

In this work, we propose to search for the exotic doubly charmed meson $T_{\mathit{cc}}^{+}$ and its analog $T_{cc\overline{s}}^{+}$ in $B_c^{+}$ decays, which provide a good environment for the formation of the exotic state containing double charm quarks. Within the molecular scheme, the production of $T_{\mathit{cc}}^{+}$ and $T_{cc\overline{s}}^{+}$ through various rescattering processes with different intermediate states are investigated. For the moderate values of model parameters, the branching ratios of $B_c^{+}$ decaying into $T_{\mathit{cc}}^{+}{\overline{D}}^0$, $T_{\mathit{cc}}^{+}{\overline{D}}^{\ast 0}$, $T_{cc\overline{s}}^{+}{\overline{D}}^0$ and $T_{cc\overline{s}}^{+}{\overline{D}}^{\ast 0}$ are estimated to be of the order of ${10}^{-7}$, ${10}^{-5}$, ${10}^{-6}$ and ${10}^{-4}$, respectively, which may be tested by future experiments.