Meson B fragmentation function with consideration of mass corrections

Mass Corrections of Vector Meson Distribution Amplitudes

A model-independent way of computing the mass corrections of vectormeson distribution amplitudes is given. The method is based on resummation of (next-to-)leading twist local operator. Key-Words: Distribution amplitude, Twist. September 1999 CPT-99/P.3892 anonymous ftp : ftp.cpt.univ-mrs.fr web : www.cpt.univ-mrs.fr ∗Unité Propre de Recherche 7061

NLL Corrections for B-Meson Radiative Exclusive Decays

We calculate the next-to-leading corrections to the branching ratio of exclusive B → Kγ decay. The renormalization scale dependence is reduced compared to the leading logarithmic result but there remains a dependence on a cutoff parameter of the hadronic model. The calculated corrections increase the predicted branching ratio by about 10%, but it remains in agreement with the experimental value.

Long distance chiral corrections in B meson amplitudes

We discuss the chiral corrections to fB and BB with particular emphasis on determining the portion of the correction that arises from long distance physics. For very small pion and kaon masses all of the usual corrections are truly long distance, while for larger masses the long distance portion decreases. These chiral corrections have been used to extrapolate lattice calculations towards the p...

Hadronization Corrections to Helicity Components of the Fragmentation Function

B Meson Transitions into Higher Mass Charmed Resonances

We use QCD sum rules to estimate the universal form factors describing the semileptonic B decays into excited charmed resonances, such as the 1 and 2 states D 1 and D ∗ 2 belonging to the s P l = 3 2 − heavy quark doublet, and the 2 and 3 states D 2 and D3 belonging to the s P l = 5 2 − doublet. “Fondazione Angelo Della Riccia” Fellow. Address after December 1st, 1999: Centre for Particle Physi...

Hadronic mass moments in inclusive semileptonic B meson decays.

We have measured the first and second moments of the hadronic mass-squared distribution in B-->X(c)l nu, for P(lepton)>1.5 GeV/c. We find = 0.251+/-0.066 GeV(2), <(M(2)(X)-)(2)> = 0.576+/-0.170 GeV(4), where M macro(D) is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b-->s gamma, we find the heavy qu...