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Volume 316 - XXVI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2018) - WG2: Small-x and Diffraction
Forward di-jets in p+A collisions in the ITMD framework
M. Matas,* C. Marquet
*corresponding author
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Pre-published on: 2018 September 20
Published on: 2018 November 23
Within the Color Glass Condensate (CGC) framework, we compute the cross section for di-jet events in the forward rapidity region in p+p and p+Pb collisions at the LHC. We make use of the recently proposed improved transverse-momentum-dependent (ITMD) factorization formula for forward di-jets, derived from CGC expressions when the jet momenta are much bigger than the saturation scale. This process is nevertheless sensitive to effects of non-linear QCD evolution, when the total transverse momentum of the jet pair is small, and as a direct consequence of those saturation effects, we predict a suppression of the nuclear modification factor for back-to-back jets. We obtain $R_{pPb}\sim 0.5$ for central collisions, and argue that the measurement of the azimuthal angle dependence of the nuclear modifications of forward di-jet events could provide a strong evidence for gluon saturation.
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