Li, HN; Melić, Blaženka
Determination of heavy-meson wave functions from B decays.
European Physical Journal C: Particles and Fields, 11
We extract the B, D, and D* meson wave functions from the CLEO data of the decays B --> K*gamma and B --> D-(*())pi in the perturbative QCD framework. In this formalism, various logarithmic corrections are organized to give the Wilson evolution from the W boson mass down to the characteristic scale of a dccay process, which is of order of the b quark mass, and the Sudakov evolution from the characteristic scale to a lower factorization scale of order Lambda(QCD) With large logarithms organized, the b quark decay amplitudes are evaluated reliably in perturbation theory. Below the factorization scale, QCD dynamics is regarded as being nonperturbative, and absorbed into meson wave functions. Because of their universality, the heavy-meson wave functions determined in this work, can be employed to make predictions of other decay modes. Mie also observe that the dependence of heavy meson wave functions on intrinsic parton transverse momenta plays an important role in the explanation of data.
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