Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Diffractive open charm production from the dipole model analysis

Jul 17, 2009, 5:45 PM
Exhibition room A (Kraków, Poland)

Exhibition room A

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
QCD at Colliders V. QCD at Colliders


Ms Agnieszka Łuszczak (Institut of Nuclear Physics PAN Cracow)


The most promising QCD based approach to DIS diffraction is formulated in terms of dipole models. In this analysis, we consider two important parameterisations of the dipole scattering amplitude, called GBW and CGC in which parton saturation results are built in. We present a precise comparison of the results of the dipole models using these two parameterisations with the newest data from HERA. The comparison we performed prompt us to discuss some subtle points of the dipole models, mostly related to the qqg component, and connect them to the approach based on the diffractive parton distributions evolved with the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) equations. Within the latter approach, the diffractive open charm production, which is the main goal of this analysis, is particularly interesting since it is sensitive to a diffractive gluon distribution. Thus, we extracted the diffractive gluon distribution from the dipole model formulae to use it for the computation of the charm contribution to F2D. We found good agreement with the HERA data on the diffractive open charm production both for the the gluon distributions from the considered dipole models and the DGLAP fits to HERA data from our earlier analysis for diffractive parton distributions with higher twist.

Primary authors

Ms Agnieszka Łuszczak (Institut of Nuclear Physics PAN Cracow) Prof. Krzysztof Golec-Biernat (Institut of Nuclear Physics PAN Cracow, University of Rzeszow)

Presentation materials