Weak decays of pseudoscalar mesons with the formation of leptons in the final state

Leptonic and semileptonic decays of pseudoscalar mesons are considered. The functional dependence of the weak form factors on the wave functions of the (q₁¯q₂) system is found. Numerical values of the coefficients and (for , K, D, and F mesons) determining the interquark potential are obtained. Within the framework of the Coulomb and oscillator models, the probability of semileptonic decays of D and F mesons is found. For D mesons, comparison with experiment is undertaken. Agreement with experiment is observed.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 19–23, March, 1982.