Relatore
Dmitry Ivanov
(Sobolev Institute of Mathematics)
Descrizione
Some hard exclusive processes can be described in a framework of QCD collinear factorization.
The amplitudes of Deeply Virtual Compton Scattering (DVCS), its crossing counterpart Timelike
Compton Scattering (TCS) and the amplitudes of neutral light and heavy vector meson (VM) production
can be calculated as a convolution of hard coefficient functions and generalized parton distributions.
It is known that the first perturbative corrections to the processes of VM production are very large
in diffractive region of small x, which calls for the resummation of enhanced
contributions at higher orders. We showed that based on BFKL resummation
approach applied earlier to small x DIS may be generalized to these hard exclusive reactions.
We obtain analytical results for resummed coefficient functions of DVCS, TCS and VM production processes.
Our analysis shows that the account of the high energy resummation stabilizes
predictions for heavy VM photoproduction.
Autore principale
Dmitry Ivanov
(Sobolev Institute of Mathematics)
