Searching for the open flavor tetraquark $$T_{c\bar{s}0}(2900)^{++}$$ T c s ¯ 0 ( 2900 ) + + in the process $$B^+\rightarrow K^+ D^+ D^-$$ B + → K + D + D -

Abstract

Abstract Inspired by recent observations of $$T_{c\bar{s}0}(2900)^0$$ T c s ¯ 0 ( 2900 ) 0 in the $$D_s^+ \pi ^-$$ D s + π - invariant mass distribution of $$B^0 \rightarrow \bar{D}^0 D_s^+ \pi ^-$$ B 0 → D ¯ 0 D s + π - decay and $$T_{c\bar{s}0}(2900)^{++}$$ T c s ¯ 0 ( 2900 ) + + in the $$D_s^+ \pi ^+$$ D s + π + invariant mass distribution of $$B^+ \rightarrow D^- D_s^+ \pi ^+$$ B + → D - D s + π + decay, we investigate the $$T_{c\bar{s}0}(2900)^{++}$$ T c s ¯ 0 ( 2900 ) + + contribution to the $$B^+ \rightarrow K^+ D^+ D^-$$ B + → K + D + D - decay in a molecular scenario, where we consider $$T_{c\bar{s}0}(2900)^{++}$$ T c s ¯ 0 ( 2900 ) + + as a $$D^{*+} K^{*+}$$ D ∗ + K ∗ + molecular state. Our estimations indicate that the fit fraction of $$T_{c\bar{s}0}(2900)^{++}$$ T c s ¯ 0 ( 2900 ) + + in the $$B^+ \rightarrow K^+ D^+ D^-$$ B + → K + D + D - is about $$13\%$$ 13 % , and its signal is visible in the $$D^+ K^+$$ D + K + invariant mass distribution. With the involvement of $$T_{c\bar{s}0}(2900)^{++}$$ T c s ¯ 0 ( 2900 ) + + , the fit fractions of $$\chi _{c0}(3915)$$ χ c 0 ( 3915 ) and $$\chi _{c2}(3930)$$ χ c 2 ( 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 $$\chi _{c0}(3915)$$ χ c 0 ( 3915 ) as the conventional charmonium.