Searching For New Physics With B to K pi Decays

Details Searching For New Physics With B to K pi Decays Searching For New Physics With B to K pi Decays

2008-11-03

arxiv.org/abs/0811.0341v2

Phys.Lett.B674:197-203,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 8 figures, 2 tables. v2:final version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2009.03.011

We propose a method to quantify the Standard Model uncertainty in B to K pi decays using the experimental data, assuming that power counting provides a reasonable estimate of the subleading terms in the 1/mb expansion. Using this method, we show that present B to K pi data are compatible with the Standard Model. We analyze the pattern of subleading terms required to reproduce the B to K pi data and argue that anomalously large subleading terms are not needed. Finally, we find that S(KS pi0) is fairly insensitive to hadronic uncertainties and obtain the Standard Model estimate S(KS pi0)=0.74 +- 0.04.

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