Leading-color fully differential two-loop soft corrections to QCD dipole showers

Research output: Contribution to journalArticle


We compute the next-to-leading-order corrections to soft-gluon radiation differentially in the one-emission phase space. We show that their contribution to the evolution of color dipoles can be obtained in a modified subtraction scheme, such that both one- and two-emission terms are amenable to Monte Carlo integration. The two-loop cusp anomalous dimension is recovered naturally upon integration over the full phase space. We present two independent implementations of the new algorithm in the two event generators Pythia and Sherpa, and we compare the resulting fully differential simulation to the Catani-Marchesini-Webber (CMW) scheme.


External organisations
  • Stanford Linear Accelerator Center (SLAC)
  • Fermi National Accelerator Laboratory
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number074013
JournalPhysical Review D
Issue number7
Publication statusPublished - 2018 Oct 1
Publication categoryResearch
Externally publishedYes