Relativistic description of exclusive semileptonic decays of heavy mesons
- Russian Academy of Sciences, Scientific Council for Cybernetics, Vavilov Street 40, Moscow, 117333 (Russia)
Using the quasipotential approach, we study exclusive semileptonic decays of heavy mesons taking into account relativistic effects. Because of a more complete relativistic description of the {ital s} quark, more precise expressions for semileptonic form factors are obtained. Various differential distributions in exclusive semileptonic decays of heavy mesons are calculated. It is argued that a consistent account of relativistic effects and a heavy quark effective theory motivated choice of the parameters of the quark-antiquark potential allow one to get a reliable value for the ratio {ital A}{sub 2}(0)/{ital A}{sub 1}(0) in the {ital D}{r_arrow}{ital K}{sup {asterisk}}{ital l}{nu}{sub {ital l}} decay as well as the ratio {Gamma}({ital D}{r_arrow}{ital K}{sup {asterisk}}{ital l}{nu}{sub {ital l}})/{Gamma}({ital D}{r_arrow}{ital K}{ital l}{nu}{sub {ital l}}). All calculated branching ratios are in accord with available experimental data. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 278569
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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