Towards a complete next-to-logarithmic description of forward exclusive diffractive dijet electroproduction at HERA: real corrections

2019/05/17 by R. Boussarie, A. V. Grabovsky, L. Szymanowski +1 · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.100.074020

published as Phys. Rev. D 100, 074020 (2019) · 40 pages, 7 figures

arxiv created 2019/05/17 · arxiv updated 2019/10/23

Abstract

We studied the ep→ ep+2jets diffractive cross section with ZEUS phase space. Neglecting the t-channel momentum in the Born and gluon dipole impact factors, we calculated the corresponding contributions to the cross section differential in β=\fracQ²Q²+M_2jets² and the angle ϕ between the leptonic and hadronic planes. The gluon dipole contribution was obtained in the exclusive k_t-algorithm with the exclusive cut y_cut=0.15 in the small y_cut approximation. In the collinear approximation we canceled singularities between real and virtual contributions to the qq dipole configuration, keeping the exact y_cut dependency. We used the Golec-Biernat - Wüsthoff (GBW) parametrization for the dipole matrix element and linearized the double dipole contributions. The results give roughly (1)/(2) of the observed cross section for small β and coincides with it for large β.

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