Mixing-Induced CP Violation in the Decay $B_d\to K^0{\bar{K}}^0$ within the Standard Model

Abstract

Recently, flavour $SU(3)$ symmetry of strong interactions has been combined with certain dynamical assumptions to derive triangle relations among $B$-meson decay-amplitudes. We show that these relations allow a prediction of the mixing-induced CP asymmetry $\acpmi(B_d\to K^0\bar K^0)$. Contrary to statements made in several previous papers, this asymmetry should be non-vanishing in the Standard Model due to QCD-penguins with internal up- and charm-quark exchanges and could be as large as $\order(30\%)$. The branching ratio BR$(B_d\to K^0{\bar{K}}^0)$ is expected to be of $\order(10^{-6})$. In the future, the results presented in this letter should allow interesting tests of the $SU(3)$ triangle relations and of the Standard Model description of CP violation.

13 pages (LaTeX) + 4 figures included, Munich Technical University preprint TUM-T31-76/94

References in corpus (7)

• Decays of $B$ Mesons to Two Light Pseudoscalars
• Waiting for the Top Quark Mass, K^+ --> π^+ ν\barν, B_s^0-\bar{B}_s^0 Mixing and CP Asymmetries in B-Decays
• Weak Coupling Phase from Decays of Charged B Mesons to $\pi K$ and $\pi \pi$
• Hadronic Penguin B Decays In The Standard And The Two-Higgs-Doublet Models
• $\sin 2\beta$ from $K\to \pi \nu \bar{\nu }$
• Measuring Strong and Weak Phases in Time-Independent B Decays
• Penguin Effects on K Pi and PiPi Decays of the $B$ Meson

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