Speaker
Mariusz Sadzikowski
(Jagiellonian University)
Description
I discuss a twist decomposition of difractive structure functions in
the difractive deep inelastic scattering (DDIS) at HERA. At low
photon virtuality and at large energy the data exhibit a strong excess above the twist-two NLO DGLAP description. It is found, that complementing the DGLAP fit by twist 4 and 6 components of the
GBW saturation model leads to a good description of data.
In conclusion, HERA provides the first, strong evidence of higher twist effects in DIS.
Author
Mariusz Sadzikowski
(Jagiellonian University)
