Hybrid kT-factorization and impact factors at NLO

Abstract

In the hybrid kT-factorization formula, one initial-state parton momentum is space-like and carries non-vanishing transverse components, while the other is on-shell. We promote this factorization formula to next-to-leading order. Studying the partonic cross section, we identify all soft and collinear divergencies in the real and virtual contribution, and recognize that all non-cancelling ones can be attributed to PDF evolution, evolution kernel, and target impact factors. In result, we construct a framework that may be used to compute NLO impact factors in general. In particular, we recover known expressions for inclusive NLO quark-and gluon impact factor corrections.

57 pages

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• Vector quarkonia at the LHC with JETHAD: A high-energy viewpoint
• Differential heavy quark pair production at small $x$
• Emergence of high-energy dynamics from cascade-baryon detections at the LHC
• High-energy QCD dynamics from bottom flavor fragmentation at the Hi-Lumi LHC
• Bottomoniumlike states in proton collisions: Fragmentation and resummation
• Forward Inclusive Jet Productions in pA Collisions
• NNLO QCD predictions of the asymmetry probe of the $Z\gamma$ pair-production process
• Predictions for charged-hadron production in $p$-O collisions at LHC energies