Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Measurement of B ( D 0 → K - π + ) Using Partial Reconstruction of B ̅ → D * + X l - ν ̅

The B → X d l + l − decay in general two Higgs doublet model

The branching ratio, forward–backward asymmetry and CP violating asymmetry for B → Xd l+l− decay, in framework of the general two Higgs doublet model, with extra phase angle in the charged–Higgs–fermion coupling, are calculated. It is shown that studying the CP violating asymmetry is an efficient tool for establishing new

Threshold Resummation in B → X c l ν l Decays

We compute the QCD form factor resumming threshold logarithms in B → Xc+ l+νl decays to next-to-leading logarithmic approximation. We present an interpolation formula including soft as well as collinear effects softened by the non-vanishing charm mass which, in the N -space, reads: σN = exp ∫ 1 0 dy [

Sudakov effects in B → π l ν l form factors

In order to obtain fundamental information about the Standard Model of particle physics from experimental measurements of exclusive hadronic two-body B-decays we have to be able to quantify the non-perturbative QCD effects. Although approaches based on the fac-torization of mass singularities into hadronic distribution amplitudes and form factors provide a rigorous theoretical framework for the...

Baryon helicity in B decay

The unexpectedly large transverse polarization measured in the decay B → φK∗ poses the question whether it is accounted for as a strong interaction effect or possibly points to a hidden nonstandard weak interaction. We extend here the perturbative argument to the helicity structure of the two-body baryonic decay and discuss qualitatively on how the baryonic B decay modes might help us in unders...