1. A perturbative approach to $B$ decays into two $\pi$ mesons
- Author
-
Dahm, M., Jakob, R., and Kroll, P.
- Subjects
High Energy Physics - Phenomenology - Abstract
The modified perturbative approach in which transverse degrees of freedom as well as Sudakov suppressions are taken into account, is applied to $B$ decays into two $\pi$ mesons. The influence of various model parameters (CKM matrix elements, $B$ decay constant, mesonic wave functions) on the results as well as short distance corrections to the weak Hamiltonian are discussed in some detail. The perturbative contributions to the $B$ decays yield branching ratios of the order of $10^{-7}\;-\;10^{-6}$ which values are well below the upper limit for the $\bar{B}^0\to\pi^+\pi^-$ branching ratio as measured by CLEO., Comment: 26 pages, RevTex, 6 figures appended (compressed and uuencode using 'uufiles')
- Published
- 1995
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