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- W1585676874 abstract "A good place to look for deviations from the Standard Model is in decay modes of B mesons, like purely leptonic decays B → lv, for which a very long Standard Model lifetime is due to an accidental suppression of the decay amplitude. For other rare decay modes involving no hadrons in the final state (e.g., B → γl+l−, B → γlvl and B → vvγ) new results on QCD factorization in exclusive processes show that all the decay rates are given in terms of a single universal form factor. Hence, trustworthy relations between different processes can be used to test the Standard Model of electroweak interactions. Sometimes, surprisingly, a large energy expansion may allow computation when a hadron is in the final state. An example is B → πl+l− which can be used to settle the ambiguity in α from a measurement of sin2α from CP asymmetries." @default.
- W1585676874 created "2016-06-24" @default.
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- W1585676874 date "2004-01-01" @default.
- W1585676874 modified "2023-10-17" @default.
- W1585676874 title "Ultra-Rare B Decays" @default.
- W1585676874 doi "https://doi.org/10.1063/1.1807331" @default.
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