Diffraction 2014

Session

Diffraction in DIS (IV)

Sep 11, 2014, 5:40 PM

Primošten (Croatia)

Conveners

Diffraction in DIS (IV)

• D.A. Ross

175. Access to Generalized Parton Distributions at COMPASS

Dr Wolf-Dieter Nowak (DESY/Freiburg University)

9/11/14, 5:40 PM

Diffraction in DIS

A brief experimentalist's introduction to Generalized Parton Distributions (GPDs) is given. Recent COMPASS results are shown on exclusive production of neutral rho-mesons, and their interpretation in terms of a phenomenological model as indication for chiral-odd, transverse GPDs is discussed. It is briefly outlined how to access GPDs at COMPASS and projections are shown for future [2016/17]...

171. Some news about GPDs and hard exclusive processes

Dr Dieter Mueller (Ruhr-University Bochum)

9/11/14, 6:05 PM

Diffraction in DIS

We report on some new theoretical results for the representation of generalized parton distributions (GPDs), the understanding of next-to-leading order corrections to hard exclusive processes, the calculation of higher twist corrections to deeply virtual Compton scattering, and we present the first global GPD fit to H1 and ZEUS data.

121. Breakdown of diffractive factorization

Prof. Boris Kopeliovich (UTFSM)

9/11/14, 6:25 PM

Diffraction in DIS

The Pomeron structure measured in diffractive DIS is a higher twist and cannot be applied to diffractive hadronic collisions. Interaction with the spectators breaks factorization of soft and hard interactions and results in a leading twist effect.

119. Impact factor for quark-antiquark-gluon jet production in DDIS

Mr Renaud Boussarie (LPT Orsay)

9/11/14, 6:45 PM

Diffraction in DIS

We present the calculation of the impact factor for the photon to quark, antiquark and gluon transition within Balitsky's high energy OPE. We also rederive the impact factor for photon to quark and antiquark transition within the same framework. These results provide the necessary building blocks for further phenomenological studies of inclusive diffractive DIS as well as for two and three...

185. New approach to QCD Factorization

Prof. Boris Ermolaev (Ioffe Physico-Technical Institute)

9/11/14, 7:05 PM

Diffraction in DIS

Factorization is the fundamental concept in order to apply QCD calculations to description of hadronic reactions. According to Fac- torization, theoretical study of any hadronic process includes both parton scattering and parton distributions. The partonic sub-processes are calcu- lated with the use of regular methods of perturbative QCD. In contrast, the parton distributions are...