The hadronic decay B → J/ψK∗ is analyzed within the framework of QCD factorization. The spin amplitudes A0, A‖ and A⊥ in the transversity basis and their relative phases are studied using various different form-factor models for B −K∗ transition. The effective parameters a2 for helicity h = 0,+,− states receive different nonfactorizable contributions and hence they are helicity dependent, contr...

As is well-known factorization is an important property of QCD whithout which we would not be able to calculate form factors or cross sections. Factorization into a hard parton-level subprocess to be calculated from perturbative QED and/or QCD, and soft hadronic matrix elements which are subject to non-perturbative QCD and are not calculable at present, has been shown to hold for a number of re...

In this research the exclusive decay of                         is calculated by QCD factorization (QCDF) method and final state interaction (FSI). First, the  decay is calculated via QCDF method. The result that is found by using the QCDF method is less than the experimental result. So FSI is considered to solve the decay. For this decay, via the exchange of mesons are chosen for the intermedi...

Factorization is possible due to the universal behavior of Yang-Mills theories in soft and collinear limits. Here, we take a small step towards a more transparent understanding of these limits by proving a form of perturbative factorization at treelevel using on-shell spinor helicity methods. We present a concrete and self-contained expression of factorization in which matrix elements in QCD ar...

We summarize the standard factorization theorems for hard processes in QCD, and describe their proofs.

We summarize the standard factorization theorems for hard processes in QCD, and describe their proofs.

In the target fragmentation region of Semi-Inclusive Deep Inelastic Scattering, diffractively produced hadron has small transverse momentum. If it is at order $\Lambda_{QCD}$, prevents to make predictions with standard collinear factorization. However, in this case, differential cross-sections can be predicted by factorization fracture functions, diffractive parton distributions. momentum much ...

We review the extension of the factorization formalism of perturbative QCD to soft rescattering associated with hard processes in nuclei.

We discuss an NNLO realization of the general mass scheme S-ACOT-χ for treatment of heavy-flavor production in neutral current deep-inelastic scattering. The connection of this scheme to the QCD factorization theorem with massive quarks is elucidated. As a new feature, kinematical constraints on collinear production of heavy quarks that are crucial near the heavy-quark threshold are included in...