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The Two Roads to "Intrinsic Charm" in B Decays

We describe two complementary ways to show the presence of higher order effects in the 1/m_Q expansion for inclusive B decays that have been dubbed "Intrinsic Charm". Apart from the lessons they can teach us about QCD's nonperturbative dynamics their consideration is relevant for precise extractions of |V_{cb}|: for they complement the estimate of the potential impact of 1/m_Q^4 contributions. We draw semiquantitative conclusions for the expected scale of Weak Annihilation in semileptonic B decays, both for its valence and non-valence components.

preprint2009arXivOpen access
Ikaros BigiThomas MannelSascha TurczykNikolai Uraltsev
hep-ph
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Open access4 authors1 topic
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Ikaros BigiThomas MannelSascha TurczykNikolai Uraltsev

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