Diffractive dijet production in deep inelastic scattering and photon-hadron collisions in the color glass condensate
Tolga Altinoluk (Departamento de Física de Partículas, IGFAE, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15706, Spain); Néstor Armesto (Departamento de Física de Partículas, IGFAE, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15706, Spain); Guillaume Beuf (European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*), Fondazione Bruno Kessler, Strada delle Tabarelle 286, Villazzano (TN), I-38123, Italy, Department of Physics, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel); Amir H. Rezaeian (Departamento de Física, Universidad Técnica Federico Santa María, Avda. España 1680, Casilla 110-V, Valparaíso, Chile, Centro Científico Tecnológico de Valparaíso (CCTVal), Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile)
We study exclusive dijet production in coherent diffractive processes in deep inelastic scattering and real (and virtual) photon-hadron ( γ(⁎) -h) collisions in the Color Glass Condensate formalism at leading order. We show that the diffractive dijet cross section is sensitive to the color-dipole orientation in the transverse plane, and is a good probe of possible correlations between the qq¯ -dipole transverse separation vector r and the dipole impact parameter b . We also investigate the diffractive dijet azimuthal angle correlations and t -distributions in γ(⁎) -h collisions and show that they are sensitive to gluon saturation effects in the small- x region. In particular, we show that the t -distribution of diffractive dijet photo-production off a proton target exhibits a dip-type structure in the saturation region. This effect is similar to diffractive vector meson production. Besides, at variance with the inclusive case, the effect of saturation leads to stronger azimuthal correlations between the jets.
