Saturation effects in forward-forward dijet production in p+Pb collisions

Abstract

We study saturation effects in the production of forward dijets in proton-lead collisions at the Large Hadron Collider, using the framework of High Energy Factorization. Such configurations, with both jets produced in the forward direction, probe the gluon density of the lead nucleus at small longitudinal momentum fraction, and also limit the phase space for emissions of additional jets. We find significant suppression of the forward dijet azimuthal correlations in proton-lead versus proton-proton collisions, which we attribute to stronger saturation of the gluon density in the nucleus than in the proton. In order to minimize model dependence of our predictions, we use two different extensions of the Balitsky-Kovchegov equation for evolution of the gluon density with sub-leading corrections.

13 pages, 4 figures; v2: added figure 4, several clarifying sentences and a reference; version accepted by PRD

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• Quarks at next-to-eikonal accuracy in the CGC I: Forward quark-nucleus scattering
• Pursuing the Precision Study for Color Glass Condensate in Forward Hadron Productions
• TMD gluon distributions at small x in the CGC theory
• Hard scale dependent gluon density, saturation and forward-forward dijet production at the LHC
• Predictions for $p+$Pb Collisions at $\sqrt{s_{NN}}=5$ TeV: Comparison with Data
• Heavy ions at the Future Circular Collider
• Dijet azimuthal correlations and conditional yields in $pp$ and $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV with the ATLAS detector
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• Inclusive prompt photon-jet correlations as a probe of gluon saturation in electron-nucleus scattering at small $x$
• Single Inclusive Jet Production in $pA$ Collisions at NLO in the small-$x$ regime
• TMD gluon distributions for multiparton processes
• Single and double inclusive forward jet production at the LHC at $\sqrt{s}$ = 7 and 13 TeV
• Forward Inclusive Jet Productions in pA Collisions
• Exploring minijets beyond the leading power
• On the Threshold Resummation in Forward pA Collisions
• Kinematical constraint effects in the evolution equations based on angular ordering
• Unintegrated gluon distributions for forward jets at LHC
• Future heavy-ion facilities: FCC-AA