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Patterns of New Physics in B Decays

Maxime Imbeault·David London·Chandradew Sharma·Nita Sinha·Rahul Sinha
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Abstract

We show that any new physics (NP) which affects B decays with penguin contributions can be absorbed by redefinitions of the standard-model (SM) diagrammatic amplitudes. Hence, there are no clean signals of NP in such decays unless there is an accurate theoretical estimate of parameters or a justifiable approximation can be made. In all decays with penguin contributions, NP simultaneously affects pairs of diagrams. The evidence for a large C' from fits to B-> pi K data is naturally explained if NP contributes to P_EW, since NP affects the P_EW and C' diagrams as a pair. The weak phase gamma measured in B-> pi K decays will always agree with its SM value even in the presence of NP, if the NP contributes in such a way that the amplitudes retain the SM form after suitable redefinitions.

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Maxime Imbeault, David London, Chandradew Sharma, Nita Sinha, Rahul Sinha. 2006-12-20. Patterns of New Physics in B Decays. https://doi.org/10.1016/j.physletb.2007.08.002

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