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arXiv · hep-ph/0411061

Isospin Amplitude Analysis of $B \to ππ$ Decays within the Standard Model

A. Ya. Parkhomenko
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Abstract

Taking into account the recent measurements of the branching ratios and CP asymmetries in the $B \to ππ$ decays by the BABAR and BELLE collaborations, an amplitude analysis based on the isospin symmetry is reported. These data allow to get an independent determination of the CKM unitarity-triangle angle $γ$. One of the best-fit solutions gives the range $γ= (65 \pm 5)^\circ$, in excellent agreement with the global CKM fit within the Standard Model. The other parameters from this fit confirm the earlier analyses that the data on $B \to ππ$ decays require various topological amplitudes (neglecting the electroweak ones) to be of comparable magnitude with large strong-phase differences.

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A. Ya. Parkhomenko. 2004-11-27. Isospin Amplitude Analysis of $B \to ππ$ Decays within the Standard Model. https://doi.org/10.1142/9789812702227_0174

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