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arXiv.org e-Print Archive
Other literature type . Preprint . 2000
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Weak form factors for heavy meson decays: An update

Authors: Melikhov, D.; Stech, B.;

Weak form factors for heavy meson decays: An update

Abstract

We calculate the form factors for weak decays of $B_{(s)}$ and $D_{(s)}$ mesons to light pseudoscalar and vector mesons. To reveal the intimate connection between different decay modes and to be able to perform the calculations in the full physical $q^2$-region we use a relativistic dispersion approach based on the constituent quark picture. This approach gives the form factors as relativistic double spectral representations in terms of the wave functions of the initial and final mesons. The form factors have the correct analytic properties and satisfy general requirements of nonperturbative QCD in the heavy quark limit. The disadvantages of quark models related to ill-defined effective quark masses and not precisely known meson wave functions are reduced by fitting the quark model parameters to lattice QCD results for the $B\to \rho$ transition form factors at large momentum transfers and to the measured total $D\to (K,K^*)l\nu$ decay rates. This allows us to predict numerous form factors for all kinematically accessible $q^2$ values.

Comment: revtex, 17 pages, improved version to be published in Phys. Rev. D. Results remain unchanged, but the presentation has been modified: now parametrizations for the form factors $A_0$, $A_1$, $A_2$ etc are given; and estimates of the weak and strong coupling constants of heavy mesons are added; few typoes corrected

Subjects by Vocabulary

Microsoft Academic Graph classification: Physics Quantum chromodynamics Quark Top quark Particle physics Meson Quark model Constituent quark Bottom quark B meson

Keywords

Nuclear and High Energy Physics, FOS: Physical sciences, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph)

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    Top 10%
    influence
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
274
Top 10%
Top 1%
Top 1%
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