Patterns of New Physics in B Decays
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.
Cite
@article{arxiv.hep-ph/0608169,
title = {Patterns of New Physics in B Decays},
author = {Maxime Imbeault and David London and Chandradew Sharma and Nita Sinha and Rahul Sinha},
journal= {arXiv preprint arXiv:hep-ph/0608169},
year = {2008}
}
Comments
4 pages, revtex, no figures; Several changes made to highlight results obtained