Abstract
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.
Highlights
At the same time, in diffractive photoproduction of dijets in ep scattering, based on the well-known factorization breaking in diffractive dijet production in pp collisions at the Tevatron [9,10,11], collinear factorization is generally not expected to hold [12,13,14]
We calculate the cross section of diffractive dijet photoproduction in ep scattering at next-to-leading order (NLO) of perturbative QCD, which we supplement by a model of factorization breaking for the resolved-photon contribution
In the present work we revisit the issue of factorization breaking in diffractive dijet photoproduction in ep scattering and perform NLO perturbative QCD (pQCD) calculations of the corresponding cross sections, which we combine with a new flavor-dependent and momentum fraction-dependent scheme of factorization breaking for the resolved-photon contribution
Summary
In diffractive photoproduction of dijets in ep scattering, based on the well-known factorization breaking in diffractive dijet production in pp collisions at the Tevatron [9,10,11], collinear factorization is generally not expected to hold [12,13,14]. Abstract 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.
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