Observation of $B^{\pm }\to \psi (2S){\pi }^{\pm }$ and search for direct CP-violation

Abstract

We report the first observation of $B^{\pm }\to \psi (2S){\pi }^{\pm }$, a Cabibbo- and color-suppressed decay. This analysis is based on $657\times 10^6$ $B\overline{B}$ events collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric $e^{+}{e}^{-}$ collider. The measured branching fraction is ($2.44\pm 0.22\pm 0.20$)$\times 10^{-5}$ and the charge asymmetry is $\mathcal{A}=0.022\pm 0.085\pm 0.016$. The ratio of the branching fractions $\mathcal{B}(B^{\pm }\to \psi (2S){\pi }^{\pm })$$/\mathcal{B}(B^{\pm }\to \psi (2S)K^{\pm })$ $=(3.99\pm 0.36\pm 0.17)$ is also determined.

6 pages, 3 figures, submitted to PRD(RC)

References in corpus (6)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Improved measurement of time-dependent CP violation in B0 -> J/Psi pi0 decays
• Observation of B^{\pm} \to χ_{c1} π^{\pm} and Search for Direct CP Violation
• Observation of the decay $B^0\to J/\psi \eta$
• Measurements of the Branching Fraction and Time-Dependent CP Asymmetries of B0 to J/Psi Pi0 decays

Cited by in corpus (4)

• Charged $B$ Mesogenesis
• Measurements of the branching fractions and CP asymmetries of B+ to J/psi pi+ and B+ to psi(2S) pi+ decays
• First evidence for direct CP violation in beauty to charmonium decays
• The decays $B\to \Psi (2S)\pi (K),{\eta }_c(2S)\pi (K)$ in the pQCD approach beyond the leading-order