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QCD Aspects of Exclusive B Decays | | Stanley J. Brodsky
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16 Apr 2001 | | Subject: | hep-ph | | Affiliation: | SLAC | | Abstract: | Exclusive B decays can be factorized as convolutions of hard scattering amplitudes involving the weak interaction with universal hadron distribution amplitudes, thus providing a new QCD-based phenomenology. In addition, semi-leptonic decay amplitudes can be computed exactly in terms of the diagonal and off-diagonal overlap of hadronic light-cone wavefunctions. I review these formalisms and the essential QCD ingredients. canonical form of the light-cone wavefunctions, valid at low values of the transverse momenta, is presented. The existence of intrinsic charm Fock states in the B meson wavefunction can enhance the production of final states of B -decay with three charmed quarks, such as B --> J/psi D pi, as well as lead to the breakdown of the CKM hierarchy. | | Source: | arXiv, hep-ph/0104153 | | Services: | Forum | Review | PDF | Favorites | |
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