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- W4299861987 abstract "Using the expansions of the heavy meson decay widths in the heavy quark mass and QCD sum rules for estimates of corresponding matrix elements,, we calculate the $D^{pm,o,s}$ decay widths and the $B^{pm,o,s}$ lifetime differences. The results for D mesons are in agreement with the data,, while it is predicted that $[Gamma (B^o)-Gamma (B^-)]/Gamma_Bse 4%,,$ and the lifetime difference of the $B^o$ and $B_s$ mesons is even smaller. The role of the weak annihilation and Pauli interference contributions to the lifetime differences are described in detail. In the course of self-consistent calculations the values of many parameters crucial for calculations with charmed and beauty mesons are found. In particular,, the perturbative pole quark masses are: $M_cse 1.65,GeV,,, M_bse 5.04,GeV,,$ and the decay constants are: $f_D(M_c)se 165,MeV,,,,f_B(M_b)se 113,MeV,$. It is also shown that the nonfactorizable corrections to the $B^o-{bar B}^o$ mixing are large,, $B_Bse (1-18%),.$ The values of the unitarity triangle parameters are found which are consistent with these results and the data available (except for the NA31 result for the $epsilon ^{prime}/epsilon$ which is too large): $lambdase 0.22,,,, Ase 0.825,,,,rho se -0.4,,,, eta se 0.2,.$" @default.
- W4299861987 created "2022-10-03" @default.
- W4299861987 creator A5053385388 @default.
- W4299861987 date "1994-07-22" @default.
- W4299861987 modified "2023-10-18" @default.
- W4299861987 title "Calculation of the D and B Meson Lifetimes" @default.
- W4299861987 doi "https://doi.org/10.48550/arxiv.hep-ph/9407353" @default.
- W4299861987 hasPublicationYear "1994" @default.
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