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arxiv: 0911.3322 · v1 · pith:NK6FTQDVnew · submitted 2009-11-17 · ✦ hep-ph

The Two Roads to "Intrinsic Charm" in B Decays

classification ✦ hep-ph
keywords decayscharmintrinsictheyannihilationapartbeencomplement
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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.

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