Dispersion approach to quark-binding effects in weak decays of heavy mesons View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2002-12

AUTHORS

Dmitri Melikhov

ABSTRACT

The dispersion approach based on the constituent quark picture and its applications to weak decays of heavy mesons are reviewed. Meson interaction amplitudes are represented within this approach as relativistic spectral integrals over the mass variables in terms of the meson wave functions and spectral densities of the corresponding Feynman diagrams. Various applications of this approach are discussed: Relativistic spectral representations for meson elastic and transition form factors at spacelike momentum transfers are constructed. Form factors at q2 > 0 are obtained by the analytical continuation. As a result of this procedure, form factors are given in the full q2 range of the weak decay in terms of the wave functions of the participating mesons. The 1/mQ expansion of the obtained spectral representations for the form factors for the particular limits of the heavy-to-heavy and heavy-to-light transitions are analysed. Their full consistency with the constraints provided by QCD for these limits is demonstrated. Predictions for form factors for B(s) and D(s) decays to light mesons are given. The B → γℓν decay and the weak annihilation in rare radiative decays are considered. Nonfactorizable corrections to the B0 mixing are calculated. Inclusive weak B decays are analysed and the differential distributions are obtained in terms of the B meson wave function. More... »

PAGES

1-154

Journal

TITLE

EPJ direct

ISSUE

1

VOLUME

4

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s1010502c0002

DOI

http://dx.doi.org/10.1007/s1010502c0002

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1009691553


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