Three-dimensional structure of hadrons through hard exclusive processes
Samuel Wallon
UPMC and LPT Orsay
Vendredi 11/10/2013, 11:00-12:00
Bat 703, p 45, CEA Saclay, Orme des Merisiers

Hard exclusive processes are central in order to get access to the three-dimensional

structure of hadrons in terms of quarks and gluons. We review their modern

theoretical background. The collinear factorization approach is presented and illustrated,

including deep virtual Compton scattering (DVCS), non-exotic and exotic meson

electroproduction. We focus in particular on the threshold resummation effects

involved in the DVCS coefficient functions. To illustrate the problem of dealing with  

power corrections to the scattering amplitudes, we consider 

the chiral-odd pion generalized parton distributions up  to twist 5. We then provide a

short survey of kt-factorization in the limit of asymptotical center-of-mass energies.

This is further illustrated by the  study of power corrections and saturation effects in

exclusive vector meson  electroproduction at HERA, of interest in view of the future

EIC and LHeC projects.

Contact : Stephane PLATCHKOV


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