Single-diffractive production of dijets within the kt-factorization approach

• Published in: Physical review. D 2017-09, Vol.96 (5)
• Main Authors: Łuszczak, Marta, Maciuła, Rafał, Szczurek, Antoni, Babiarz, Izabela
• Format: Article
• Language: English
• Subjects: Dependence; Distribution functions; Factorization; Mathematical analysis; Survival; Transverse momentum; Variables
• ISSN: 2470-0010; 2470-0029
• DOI: 10.1103/PhysRevD.96.054018

We discuss single-diffractive production of dijets. The cross section is calculated within the resolved Pomeron picture, for the first time in the kt-factorization approach, neglecting transverse momentum of the Pomeron. We use Kimber-Martin-Ryskin unintegrated parton (gluon, quark, antiquark) distributions in both the proton as well as in the Pomeron or subleading Reggeon. The unintegrated parton distributions are calculated based on conventional mmht2014nlo parton distribution functions in the proton and H1 Collaboration diffractive parton distribution functions used previously in the analysis of diffractive structure function and dijets at HERA. For comparison, we present results of calculations performed within the collinear-factorization approach. Our results remain those obtained in the next-to-leading-order approach. The calculation is (must be) supplemented by the so-called gap survival factor, which may, in general, depend on kinematical variables. We try to describe the existing data from Tevatron and make detailed predictions for possible LHC measurements. Several differential distributions are calculated. The E¯T, η¯ and xp¯ distributions are compared with the Tevatron data. A reasonable agreement is obtained for the first two distributions. The last one requires introducing a gap survival factor which depends on kinematical variables. We discuss how the phenomenological dependence on one kinematical variable may influence dependence on other variables such as E¯T and η¯. Several distributions for the LHC are shown.