Measurements of branching fraction and direct $CP$ asymmetry in $B^{\pm }\to K_S^0{K}_S^0{K}^{\pm }$ and a search for $B^{\pm }\to K_S^0{K}_S^0{\pi }^{\pm }$

Abstract

We study charmless hadronic decays of charged $B$ mesons to the final states $K_S^0{K}_S^0{K}^{\pm }$ and $K_S^0{K}_S^0{\pi }^{\pm }$ using a $711f{b}^{-1}$ data sample that contains $772\times 10^6$ $B\bar{B}$ pairs, and was collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. For $B^{\pm }\to K_S^0{K}_S^0{K}^{\pm }$, the measured branching fraction and direct $CP$ asymmetry are $[10.42\pm 0.43(stat)\pm 0.22(syst)]\times 10^{-6}$ and [$+1.6\pm 3.9(stat)\pm 0.9(syst)$]%, respectively. In the absence of a statistically significant signal for $B^{\pm }\to K_S^0{K}_S^0{\pi }^{\pm }$, we obtain a 90% confidence-level upper limit on its branching fraction as $8.7\times 10^{-7}$.

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Cited by in corpus (2)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Direct CP violation in multi-body $B$ decays with the $a_0^0(980)$--$f_0(980)$ mixing