Measurement of branching fraction and direct $CP$ asymmetry in charmless $B^{+}\to K^{+}{K}^{-}{\pi }^{+}$ decays at Belle

Abstract

We report a study of the charmless hadronic decay of the charged $B$ meson to the three-body final state $K^{+}{K}^{-}{\pi }^{+}$. The results are based on a data sample that contains $772\times 10^6$ $B\bar{B}$ pairs collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. The measured inclusive branching fraction and the direct $CP$ asymmetry are $(5.38\pm 0.40\pm 0.35)\times 10^{-6}$ and $-0.170\pm 0.073\pm 0.017$, respectively, where the first uncertainties are statistical and the second are systematic. The $K^{+}{K}^{-}$ invariant mass distribution of the signal candidates shows an excess in the region below $1.5$ GeV/$c^2$, which is consistent with the previous studies from BaBar and LHCb. In addition, strong evidence of a large direct $CP$ asymmetry is found in the $K^{+}{K}^{-}$ low-invariant-mass region.

arXiv comment7 pages, 3 figures

References in corpus (7)

• Evidence for B0->pi0pi0
• Measurement of CP violation in the phase space of $B^{\pm }\to K^{+}{K}^{-}{\pi }^{\pm }$ and $B^{\pm }\to {\pi }^{+}{\pi }^{-}{\pi }^{\pm }$ decays
• Measurements of $CP$ violation in the three-body phase space of charmless $B^{\pm }$ decays
• Neutral B Flavor Tagging for the Measurement of Mixing-induced CP Violation at Belle
• CP asymmetries in three-body B+- decays to charged pions and kaons
• CP violation and CPT invariance in B+- decays with final state interactions
• Observation of the Decay B+ --> K+K-pi+

Cited by in corpus (16)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Amplitude analysis of the $B^{+}\to {\pi }^{+}{\pi }^{+}{\pi }^{-}$ decay
• Amplitude analysis of $B^{\pm }\to {\pi }^{\pm }{K}^{+}{K}^{-}$ decays
• Contributions of $K_0^{\ast }(1430)$ and $K_0^{\ast }(1950)$ in the three-body decays $B\to K\pi h$
• Branching Fractions and CP Violation in $B^{-}\to K^{+}{K}^{-}{\pi }^{-}$ and $B^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^{-}$ Decays
• Will the subprocesses $\rho (770,1450{)}^0\to K^{+}{K}^{-}$ contribute large branching fractions for $B^{\pm }\to {\pi }^{\pm }{K}^{+}{K}^{-}$ decays?
• Contributions for the kaon pair from $\rho (770)$, $\omega (782)$ and their excited states in the $B\to K\bar{K}h$ decays
• Direct $CP$ violation of three bodies decay process from the resonance effect
• Analysis of three-body charmless $B$-meson decays under the factorization-assisted topological-amplitude approach
• Measurement of the relative branching fractions of $B^{+}\to h^{+}{h}^{\prime +}{h}^{\prime -}$ decays
• Role of $f_0(980)$ and $a_0(980)$ in the $B^{-}\to {\pi }^{-}{K}^{+}{K}^{-}$ and $B^{-}\to {\pi }^{-}{K}^0{\bar{K}}^0$ reactions
• Measurements of branching fraction and direct $CP$ asymmetry in $B^{\pm }\to K_S^0{K}_S^0{K}^{\pm }$ and a search for $B^{\pm }\to K_S^0{K}_S^0{\pi }^{\pm }$
• Measurement of branching fraction and final-state asymmetry for the ${\bar{B}}^0\to K_S^0{K}^{\mp }{\pi }^{\pm }$ decay
• Angular analysis of the low $K^{+}{K}^{-}$ invariant mass enhancement in $B^{+}\to K^{+}{K}^{-}{\pi }^{+}$ decays
• Parametrizations of three-body hadronic $B$- and $D$-decay amplitudes