Eur. Phys. J. C (2024) 84: 681
https://doi.org/10.1140/epjc/s10052-024-13044-6

Regular Article - Theoretical Physics

Searching for the open flavor tetraquark $T_{c\overline{s}0}{(2900)}^{++}$ in the process $B^{+}\to K^{+}{D}^{+}{D}^{-}$

¹ School of Physics, Southeast University, 210094, Nanjing, People’s Republic of China
² School of Physics and Microelectronics, Zhengzhou University, 450001, Zhengzhou, Henan, People’s Republic of China
³ Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guangxi Normal University, 541004, Guilin, People’s Republic of China
⁴ Lanzhou Center for Theoretical Physics, Lanzhou University, 730000, Lanzhou, People’s Republic of China

^c chendy@seu.edu.cn

Received: 25 September 2023
Accepted: 19 June 2024
Published online: 10 July 2024

Abstract

Inspired by recent observations of $T_{c\overline{s}0}{(2900)}^0$ in the $D_s^{+}{\pi }^{-}$ invariant mass distribution of $B^0\to {\overline{D}}^0{D}_s^{+}{\pi }^{-}$ decay and $T_{c\overline{s}0}{(2900)}^{++}$ in the $D_s^{+}{\pi }^{+}$ invariant mass distribution of $B^{+}\to D^{-}{D}_s^{+}{\pi }^{+}$ decay, we investigate the $T_{c\overline{s}0}{(2900)}^{++}$ contribution to the $B^{+}\to K^{+}{D}^{+}{D}^{-}$ decay in a molecular scenario, where we consider $T_{c\overline{s}0}{(2900)}^{++}$ as a $D_{}^{\ast +}K_{}^{\ast +}$ molecular state. Our estimations indicate that the fit fraction of $T_{c\overline{s}0}{(2900)}^{++}$ in the $B^{+}\to K^{+}{D}^{+}{D}^{-}$ is about $13\%$, and its signal is visible in the $D^{+}{K}^{+}$ invariant mass distribution. With the involvement of $T_{c\overline{s}0}{(2900)}^{++}$, the fit fractions of ${\chi }_{c0}(3915)$ and ${\chi }_{c2}(3930)$ may be much different with the ones obtained by the amplitude analysis in Ref. [Aaij et al. Phys. Rev. D 102:112003, 2020], which may shed light on the long standing puzzle of ${\chi }_{c0}(3915)$ as the conventional charmonium.