A precise sum rule among four B -> Kpi CP asymmetries

Details A precise sum rule among four B -> Kpi CP asymmetries A precise sum rule among four B -> Kpi CP asymmetries

2005-08-03

arxiv.org/abs/hep-ph/0508047v3

Phys.Lett. B627 (2005) 82-88

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, a few reference added, to be published in Physics Letters B

Scientific paper

10.1016/j.physletb.2005.09.014

A sum rule relation is proposed for direct CP asymmetries in $B\to K\pi$ decays. Leading terms are identical in the isospin symmetry limit, while subleading terms are equal in the flavor SU(3) and heavy quark limits. The sum rule predicts $A_{\rm CP}(B^0\to K^0\pi^0)=-0.17 \pm 0.06$ using current asymmetry measurements for the other three $B\to K\pi$ decays. A violation of the sum rule would be evidence for New Physics in $b\to s\bar qq$ transitions.

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