Quark structure and weak decays of heavy mesons
نویسندگان
چکیده
منابع مشابه
Top quark decays into heavy quark mesons.
For top quark decays into heavy quark mesons Υ and B̄ c , a complete calculation to the leading order both in QCD coupling constant αs and in v, the typical velocity of the heavy quarks inside the mesons, is performed. Relatons between the top quark mass and the decay branching ratios are studied. Comparion with the results which are obtained by using the quark frangmentation functions is also d...
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We study the radiative leptonic decays of heavy mesons within the covariant light-front model. Using this model, both the form factors FV and FA have the same form when the heavy quark limit is taken. In addition, the relation between the form factor FV and the decay constant of heavy meson FH is obtained. The hadronic parameter β can be determine by the parameters appearing in the wave functio...
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The recent theoretical progress in the description of semileptonic decays in the framework of the heavy mass expansion is summarized. Both inclusive and exclusive decays are considered. Contribution to the XXIXth Rencontres de Moriond, Electroweak Interactions and Unified Theories, Méribel, France, March 12–19, 1994. CERN-TH.7264/94 May 1994
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The parameters χ1,2, which measure nonfactorizable soft gluon contributions to hadronic weak decays of mesons, are updated by extracting them from the data of D, B → PP, V P decays (P : pseudoscalar meson, V : vector meson). It is found that χ2 ranges from −0.36 to −0.60 in the decays from D → K̄π to D+ → φπ+, D → K̄π, while it is of order 10% with a positive sign in B → ψK, Dπ, Dπ, Dρ decays. Th...
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Nous soulignons les caractéristiques du modèle des quarks et ses succès dans la description du spectre et des transitions de hadrons lourds ou légers, comparantbrì evement aux premiers principes de QCD. Pour montrer l'utilité actuelle des techniques et intuition physique du modèle, nous présentons un modèle des quarks semi-relativiste des facteurs de forme des mésons qui présente l'invariance d...
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ژورنال
عنوان ژورنال: Zeitschrift für Physik C Particles and Fields
سال: 1994
ISSN: 0170-9739,1434-6052
DOI: 10.1007/bf01577551