Semileptonic form factors: A model-independent approach
نویسندگان
چکیده
منابع مشابه
Semileptonic form factors – a model-independent approach
We demonstrate that the B → D(∗)lν form factors can be accurately predicted given the slope parameter ρ2 of the Isgur-Wise function. Only weak assumptions, consistent with lattice results, on the wavefunction for the light degrees of freedom are required to establish this result. We observe that the QCD and 1 mQ corrections can be systematically represented by an effective Isgur-Wise function o...
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We give a pedagogical discussion of the physics underlying dispersion relation-derived parameterizations of form factors describing B → πlν̄ and B → Dlν̄. Moments of the dispersion relations are shown to provide substantially tighter constraints on the f+(t) form factor describing B̄ → πlν than the unweighted dispersion relation alone. Heavy quark spin symmetry relations between the B → πlν̄ and B ...
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We study in detail the kinematics of semileptonic M l3 (M → M ′ lν) decay, considering only the new models preserving all the gauge symmetries of the Standard Model (SM), and assuming that neutrinos are massless and left-handed as in the SM. And we present a brief review of the recent theoretical progress on model independent constraints on the form factors of M l3 decays using dispersion relat...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.63.032006