New Physics contribution to $B \to K π$ decays in SCET

Details New Physics contribution to $B \to K π$ decays in SCET New Physics contribution to $B \to K π$ decays in SCET

2009-11-10

arxiv.org/abs/0911.1868v2

Phys.Rev.D81:095008,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, one reference added, section V modified, conclusions unchanged

Scientific paper

10.1103/PhysRevD.81.095008

We analyze the $5\sigma$ difference between the CP asymmetries of the $B^0 \to K^+ \pi^-$ and $B^+ \to K^+ \pi^0$ decays within the Soft Collinear Effective Theory. We find that in the Standard Model, such a big difference cannot be achieved. We classify then the requirements for the possible New Physics models, which can be responsible for the experimental results. As an example of a New Physics model we study minimal supersymmetric models, and find that the measured asymmetry can be obtained with non-minimal flavor violation.

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