Analysis of $B \to Kπ$ decays with small elastic final state interactions

Details Analysis of $B \to Kπ$ decays with small elastic final state interactions Analysis of $B \to Kπ$ decays with small elastic final state interactions

2000-09-18

arxiv.org/abs/hep-ph/0009210v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, with ReVTeX, 15 pages, 3 figures, correct header title, misprint in the abstract removed

Scientific paper

An analysis of $B \to K\pi$ decays is given, assuming a small elastic $\pi K $ rescattering phase difference.Using factorization model only for the tree-level and electroweak penguin amplitudes, we show that the strong penguin amplitude, its absorptive part and the CP-violation weak phase $\gamma$ can be obtained from the measured $B \to K\pi$ branching ratios. The strength of the strong penguin and its absorptive part thus obtained from the CLEO data, are found to be very close to factorization model values and suggests a current $s$ quark mass around $m_{s} = 106 \rm MeV$. The central value of $\gamma$ is found to be around $76.10^{\circ}$, with a possible value in the range $50^{\circ}-100^{\circ}$.

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