Non-leptonic B Meson Decays using Perturbative QCD
نویسندگان
چکیده
منابع مشابه
Exclusive non-leptonic B meson decays from QCD
Exclusive non-leptonic decays play a crucial part in the on-going programme to clarify the sources of CP violation and rare flavour-changing phenomena. As regards CP violation this is illustrated by the fact that there exists a fair knowledge of the length of each of the sides of the unitarity triangle from semi-leptonic B decays and BB̄ mixing. Since recently, the angle β (more precisely, sin 2...
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Resummation of large QCD radiative corrections, including leading and next-to-leading logarithms, in pion electromagnetic form factor is reviewed. Similar formalism is applied to exclusive processes involving heavy mesons, and leads to Sudakov suppression for the semi-leptonic decay B → πlν. It is found that, with the inclusion of Sudakov effects, perturbative QCD analysis of this decay is poss...
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We review the perturbative QCD formalism for exclusive heavy meson decays, concentrating on the three-scale factorization theorem for nonleptonic processes. The formalism is then extended to the radiative decay B → Kγ, which occurs through penguin diagrams. It is observed that the contributions from the operators other than the penguin one b → sγ are not negligible. From the best fit to the exp...
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The amplitude for the exclusive nonleptonic decay of a heavy meson into two light pseudoscalar mesons is analyzed using the factorization formalism of perturbative QCD for exclusive reactions at large momentum transfer. We show that the leading contribution to such amplitudes is proportional to (rs(Q2) where Q” scales with the heavy meson mass squared. Branching ratios for a few B” decay modes ...
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To the leading order, the radiative leptonic decays Bc → γlν̄ ( l = e, μ ) are studied carefully. In the study, a non-relativistic constituent quark model and the effective Lagrangian for the heavy flavour decays are used. As a result, the branching ratios turn out to be of the orders of 10 for Bc → γμν̄ or for Bc → γeν̄. Based on the study, we point out the decays being accessible experimentally ...
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ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1999
ISSN: 0004-9506
DOI: 10.1071/ph99011