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Precise predictions for B -> Xc tau nu decay distributions

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arxiv 1406.7013 v2 pith:GB6LEDBK submitted 2014-06-26 hep-ph

Precise predictions for B -> Xc tau nu decay distributions

classification hep-ph
keywords decaydistributionsenergymassmodelprecisepredictionsstandard
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We derive precise standard model predictions for the dilepton invariant mass and the tau energy distributions in inclusive B -> Xc tau nu decay. We include Lambda_QCD^2/m_b^2 and alpha_s corrections using the 1S short-distance mass scheme, and estimate shape function effects near maximal tau energy. These results can improve the sensitivity of b -> c tau nu related observables to beyond standard model physics.

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