Results for ϕ_1 and ϕ_2 from Belle
Year: 2013
Type: preprint
Abstract: We present a summary of measurements sensitive to the CKM angles ϕ_1 and ϕ_2, performed by the Belle experiment using the final data sample of 772 \times 10^{6} $B\bar{B}$ pairs at the Υ(4S) resonance produced at the KEK asymmetric e^+e^- collider. We discuss CP asymmetries from the decays $B^{0}\to c\bar{c} K^{0}$, $D^{(*)+}D^{(*)-}$ which are sensitive to ϕ_1 and from $B \to π^{+} π^{-}$, $a_1{\pm}π^{\mp}$ being sensitive to ϕ_2. Furthermore the measurement of the branching fraction of $B^{0}\to ρ^0ρ^0$ decays and fraction of longitudinal polarization in this decay is presented and used to constrain ϕ_2 with an isospin analysis in the $B\to ρρ$ system.
Source: arXiv (Cornell University)
Author: Vanhoefer, P.
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4394660438