5 papers
Strongly-ordered infrared limits for subtraction counterterms from factorisation
Lorenzo Magnea, Calum Milloy, Chiara Signorile-Signorile +2
After a brief introduction to the problem of subtraction of infrared divergences for high-order collider observables, we present a preliminary study of strongly-ordered soft and co…
Two-parton scattering in the high-energy limit: climbing two- and three-Reggeon ladders
Leonardo Vernazza, Giulio Falcioni, Einan Gardi +2
We review recent progress on the calculation of scattering amplitudes in the high-energy limit. We start by illustrating the shockwave formalism, which allows one to calculate ampl…
Climbing three-Reggeon ladders: four-loop amplitudes in the high-energy limit in full colour
Giulio Falcioni, Einan Gardi, Calum Milloy +1
Using an iterative solution of rapidity evolution equations, we compute partonic gauge theory amplitudes at four loops in full colour up to the Next-to-Next-to-Leading Log…
Wilson-line geometries and the relation between IR singularities of form factors and the large-x limit of DGLAP splitting functions
Calum Milloy, Giulio Falcioni, Einan Gardi
We discuss the relation between the infrared singularities of on-shell partonic form factors and parton distribution functions (PDFs) near the elastic limit, through their factoris…
Relating amplitude and PDF factorisation through Wilson-line geometries
Giulio Falcioni, Einan Gardi, Calum Milloy
We study long-distance singularities governing different physical quantities involving massless partons in perturbative QCD by using factorisation in terms of Wilson-line correlato…