A framework for second-order parton showers

Hai Tao Li, Peter Skands

Research output: Contribution to journalArticleResearchpeer-review

48 Citations (Scopus)


A framework is presented for including second-order perturbative corrections to the radiation patterns of parton showers. The formalism allows to combine O(αs 2)-corrected iterated 2→3 kernels for “ordered” gluon emissions with tree-level 2→4 kernels for “unordered” ones. The combined Sudakov evolution kernel is thus accurate to O(αs 2). As a first step towards a full-fledged implementation of these ideas, we develop an explicit implementation of 2→4 shower branchings in this letter.

Original languageEnglish
Pages (from-to)59-66
Number of pages8
JournalPhysics Letters B
Publication statusPublished - 10 Aug 2017


  • Monte Carlo event generators
  • Parton showers
  • QCD resummation

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