The double-soft integral for an arbitrary angle between hard radiators |
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| Authors: | Fabrizio Caola Maximilian Delto Hjalte Frellesvig Kirill Melnikov |
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| Institution: | 1.IPPP,Durham University,Durham,UK;2.Institute for Theoretical Particle Physics,KIT,Karlsruhe,Germany |
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| Abstract: | We consider the double-soft limit of a generic QCD process involving massless partons and integrate analytically the double-soft eikonal functions over the phase-space of soft partons (gluons or quarks) allowing for an arbitrary relative angle between the three-momenta of two hard massless radiators. This result provides one of the missing ingredients for a fully analytic formulation of the nested soft-collinear subtraction scheme described in Caola et al. (Eur Phys J C 77(4):248, 2017). |
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