We present a coordinate space version of the factorization formula for connected tree part chronological products. consider general framework, and then we apply it QCD case.

We compute the imaginary part of the 2-loop vertex corrections in the QCD Factorization framework for hadronic two-body decays as B → ππ. This completes the NNLO calculation of the imaginary part of the topological tree amplitudes and represents an important step towards a NNLO prediction of direct CP asymmetries in QCD Factorization. Concerning the technical aspects, we find that soft and coll...

In this work, we give a detailed discussion for QCD factorization involved in the complete chirally enhanced power corrections in the heavy quark limit for B decays to two light pseudoscalar mesons, and present some detailed calculations of radiative corrections at the order of αs. We point out that the infrared finiteness of the vertex corrections in the chirally enhanced power corrections req...

Exclusive processes in hard electroproduction is one of the best place for understanding the factorization properties of QCD. The HERA experiment recently provided precise data for ρ electroproduction, including all spin density matrix elements. From QCD, it is expected that such a process should factorize between a hard (calculable) coefficient function, and hadronic (p and ρ) matrix elements....

We study the factorization of quasi generalized quark distributions with twist-2 parton distributions. use an approach which is different than that used in literature. Using we derive relations all at one-loop. The contributions from gluon are included. Our results apply not only to a spin-1/2 hadron but also those any spin.

I review the meaning of “QCD factorization” in hadronic two-body B decays and then discuss recent results of theoretical (rather than phenomenological) nature: the proof of factorization at two loops; the identification of “chirally enhanced” power corrections; and the role of annihilation contributions.

We discuss a model-independent framework for the analysis of the radiative B-meson decays B → K * γ and B → ργ based on the heavy-quark limit of QCD. We present a factorization formula for the treatment of B → V γ matrix elements involving charm (or up-quark) loops, which contribute at leading power in ΛQCD/mB to the decay amplitude. Annihilation topologies are power suppressed, but still calcu...

We compare two approaches to the description of pion Compton scattering at moderate momentum transfer, one being based on local duality QCD sum rules for the invariant amplitudes of the process, which have been derived recently, and the other on the modified factorization formula with Sudakov effects included. We find that perturbative QCD predictions are dominant over those from QCD sum rules ...