https://doi.org/10.1140/epjc/s10052-018-6180-7
Regular Article - Theoretical Physics
The double-soft integral for an arbitrary angle between hard radiators
1
IPPP, Durham University, Durham, UK
2
Institute for Theoretical Particle Physics, KIT, Karlsruhe, Germany
* e-mail: fabrizio.caola@durham.ac.uk
Received:
14
August
2018
Accepted:
22
August
2018
Published online:
29
August
2018
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).
© The Author(s), 2018
