The double-soft integral for an arbitrary angle between hard radiators

Caola, Fabrizio (Aff1, 0000 0000 8700 0572, IPPP, Durham University, Durham, UK) ; Delto, Maximilian (Aff2, 0000 0001 0075 5874, Institute for Theoretical Particle Physics, KIT, Karlsruhe, Germany) ; Frellesvig, Hjalte (Aff2, 0000 0001 0075 5874, Institute for Theoretical Particle Physics, KIT, Karlsruhe, Germany) ; Melnikov, Kirill (Aff2, 0000 0001 0075 5874, Institute for Theoretical Particle Physics, KIT, Karlsruhe, Germany)

29 August 2018

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 ).


Published in: EPJC 78 (2018) 687
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-018-6180-7
License: CC-BY-3.0



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