Computing one-loop corrections to effective vertices with two scales in the EFT for Multi-Regge processes in QCD

Abstract

The computation of one-loop corrections to Reggeon-Particle-Particle effective vertices with two scales of virtuality is considered in the framework of gauge-invariant effective field theory for Multi-Regge processes in QCD. Rapidity divergences arising in loop integrals are regulated by "tilted Wilson lines" prescription. General analysis of rapidity divergences at one loop is given and necessary scalar integrals with one and two scales of virtuality are computed. Two examples of effective vertices at one loop are considered: the effective vertex of interaction of (space-like) virtual photon with one Reggeized and one Yang-Mills quark and the effective vertex of Reggeized gluon to Yang-Mills gluon transition with an insertion of the operator $\mathrm{tr}\left[G_{\mu \nu }{G}^{\mu \nu }\right]$ carrying the (space-like) off-shell momentum. All terms $\sim r^{\pm \epsilon }$ in the rapidity-regulator variable $r$ cancel between diagrams and only $\log r$-divergence is left. It is checked on several examples, that obtained results indeed allow one to reproduce Regge limit of one-loop QCD scattering amplitudes.

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References in corpus (10)

• Factorization constraints for soft anomalous dimensions in QCD scattering amplitudes
• Presenting LiteRed: a tool for the Loop InTEgrals REDuction
• Sector Decomposition
• BFKL Pomeron, Reggeized gluons and Bern-Dixon-Smirnov amplitudes
• Description of F2 and FL at small x using a collinearly-improved BFKL resummation
• $B\bar{B}$ angular correlations at the LHC in parton Reggeization approach merged with higher-order matrix elements
• On the one-loop calculations with Reggeized quarks
• The high energy behavior of QCD: The effective action and the triple-Pomeron-vertex
• Analytic structure of the $n=7$ scattering amplitude in $\mathcal{N}=4$ SYM theory in multi-Regge kinematics: Conformal Regge cut contribution
• DIS structure functions in the NLO approximation of the Parton Reggeization Approach

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