decays within the factorization approach in QCD
نویسنده
چکیده
Using the factorization approach and considering the contributions of the currentcurrent, QCD penguin and electroweak penguin operators at the leading approximation, the decay amplitudes and decay widths of Bq → Dq(D q)P and Bq → Dq(D q )V transitions, where q = u, d, s and P and V are pseudoscalar and vector mesons, are calculated in terms of the transition form factors of the Bq → Dq and Bq → D q . Having computed those form factors in three-point QCD sum rules, the branching fraction for these decays are also evaluated. A comparison of our results with the predictions of the perturbative QCD as well as the existing experimental data is presented. e-mail: e146342 @ metu.edu.tr e-mail: khosravi.reza @ gmail.com e-mail: phy1g832889 @shiraz.ac.ir
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