https://doi.org/10.1140/epjc/s10052-016-4304-5
Regular Article - Theoretical Physics
A fresh look at factorization breaking in diffractive photoproduction of dijets at HERA at next-to-leading order QCD
1
National Research Center “Kurchatov Institute”, Petersburg Nuclear Physics Institute (PNPI), Gatchina, 188300, Russia
2
Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 9, 48149, Münster, Germany
* e-mail: vguzey@pnpi.spb.ru
Received:
7
June
2016
Accepted:
1
August
2016
Published online:
19
August
2016
We calculate the cross section of diffractive dijet photoproduction in ep scattering at next-to-leading order (NLO) of perturbative QCD (pQCD), which we supplement by a model of factorization breaking for the resolved-photon contribution. In this model, the suppression depends on the flavor and momentum fraction of the partons in the photon. We show that within experimental and theoretical uncertainties, the resulting approach provides a good description of the available HERA data in most of the bins. Hence, taken together with the observation that NLO pQCD explains well the data on diffractive photoproduction of open charm in ep scattering, our model of factorization breaking presents a viable alternative to the scheme based on the global suppression factor.
© The Author(s), 2016
