$B \to \pi \pi$ decays: branching ratios and CP asymmetries

A. B. Kaidalov; M. I. Vysotsky

doi:10.1134/S1063778807040138

$B \to \pi \pi$ decays: branching ratios and CP asymmetries

High Energy Physics - Phenomenology 2008-11-26 v4

Authors: A. B. Kaidalov , M. I. Vysotsky

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Abstract

Theoretically motivated smallness of the penguin amplitude in $B \to \pi \pi$ decays allowes to calculate the value of the unitarity triangle angle $\alpha (\phi_2)$ with good accuracy. The relatively large branching ratio of the decay into $\pi^0 \pi^0$ is explained by the large value of FSI phase difference between $\Delta I = 1/2$ and $\Delta I = 3/2$ tree amplitudes.

Keywords

B meson decays branching ratios CP asymmetries unitarity triangle penguin amplitude FSI phase

Cite

@article{arxiv.hep-ph/0603013,
  title  = {$B \to \pi \pi$ decays: branching ratios and CP asymmetries},
  author = {A. B. Kaidalov and M. I. Vysotsky},
  journal= {arXiv preprint arXiv:hep-ph/0603013},
  year   = {2008}
}

Comments

Analysis of direct CPV asymmetries is expanded; the relation with that in $K\pi$ decays is discussed. Submitted to Yad. Fiz

$B \to \pi \pi$ decays: branching ratios and CP asymmetries

Abstract

Keywords

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