Intrinsic charm in B-meson decays
نویسندگان
چکیده
منابع مشابه
Intrinsic Charm in B-meson Decays
Light cone hadron wave functions support Fock states of arbitrarily high particle number: their heavy quark content arises naturally through QCD interactions. We discuss what role c¯ c pairs, intrinsic to a hadron's structure, can play in B-meson decays. The effects can be prominent in hadronic decays for which the tree-level contributions are Cabibbo-suppressed, as in B → πK decay, and they mi...
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We discuss the role of so-called “intrinsic-charm” operators in semi-leptonic B-meson decays, which appear first at order 1/mb in the heavy quark expansion. We show by explicit calculation that – at scales μ ≤ mc – the contributions from “intrinsiccharm” effects can be absorbed into short-distance coefficient functions multiplying, for instance, the Darwin term. Then, the only remnant of “intri...
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Combining heavy quark effective theory and the chiral Lagrangian approach we investigate D meson radiative decays. First, we reanalyse D∗ → Dγ decays using heavy quark spin symmetry, chiral symmetry Lagrangian, but including also the light vector mesons. Then, we calculate branching ratios D → V γ. We make some comments on the Cabbibo suppressed decays D → ρ/ωγ and the branching ratios of D → P...
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We discuss semileptonic B decays of the form B → J/Ψ eν X as possible probes for intrinsic charm. We calculate the leading order perturbative contribution to the process B− → J/Ψ e−νe and find a branching ratio of 6.8 × 10−10. We estimate the intrinsic charm contribution and find that it could be larger, although its precise value cannot be calculated. Because the kinematically allowed upper li...
متن کاملOn the Role of “Intrinsic Charm” in Semi-Leptonic B-Meson Decays
We discuss the role of so-called “intrinsic-charm” operators in semi-leptonic B-meson decays, which appear first at order 1/mb in the heavy quark expansion. We show by explicit calculation that – at scales μ ≤ mc – the contributions from “intrinsiccharm” effects can be absorbed into short-distance coefficient functions multiplying, for instance, the Darwin term. Then, the only remnant of “intri...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(02)01954-0