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The Two Roads to "Intrinsic Charm" in B Decays

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arxiv 0911.3322 v1 pith:NK6FTQDV submitted 2009-11-17 hep-ph

Ikaros Bigi (Notre Dame U.) , Thomas Mannel (Univ. Siegen) , Sascha Turczyk (Univ. Siegen) , Nikolai Uraltsev (Univ. Siegen) This is my paper · ORCID
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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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  1. Kinematic Moments of $\bar{B}\to X_c \ell \bar{\nu}_\ell$ to Order $\mathcal{O}(\Lambda_{\rm QCD}^5/m_b^5)$

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Analytic HQE moments for inclusive B to X_c l nu are extended to O(Lambda^5/m_b^5), including q^2 moments with a lepton-energy cut, and a CLEO data tension is identified.

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