Constraints on the phase $γ$ and new physics from $B\to Kπ$ Decays

Details Constraints on the phase $γ$ and new physics from $B\to Kπ$ Decays Constraints on the phase $γ$ and new physics from $B\to Kπ$ Decays

1999-05-11

arxiv.org/abs/hep-ph/9905296v2

Phys.Rev.Lett. 84 (2000) 18-21

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version with analysis done using new data from CLEO. RevTex, 11 Pages with two figures

Scientific paper

10.1103/PhysRevLett.84.18

Recent results from CLEO on $B\to K\pi$ indicate that the phase $\gamma$ may be substantially different from that obtained from other fit to the KM matrix elements in the Standard Model. We show that $\gamma$ extracted using $B\to K\pi, \pi\pi$ is sensitive to new physics occurring at loop level. It provides a powerful method to probe new physics in electroweak penguin interactions. Using effects due to anomalous gauge couplings as an example, we show that within the allowed ranges for these couplings information about $\gamma$ obtained from $B\to K \pi, \pi\pi$ can be very different from the Standard Model prediction.

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