The analytic two-loop soft function for leading-jet pT

Samuel Abreu, Jonathan R. Gaunt, Pier Francesco Monni, Robert Szafron*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present the calculation of the two-loop soft function for the transverse momentum distribution of the leading jet produced in association with any colour-singlet system (e.g. a Higgs or a Z boson). This constitutes a central ingredient for the resummation of the above distribution as well as the jet-vetoed cross section at the next-to-next-to-next-to-leading logarithmic order, both of which play an important role in the precision physics programme at the Large Hadron Collider. The calculation is performed in soft-collinear effective theory with an appropriate regularisation of the rapidity divergences that occur in the phase-space integrals. We obtain analytic results by employing an exponential regulator and by taking a Laurent expansion in the jet radius R. All expressions are presented as supplementary material attached to this article.
Original languageEnglish
Article number268
Pages (from-to)1-17
Number of pages17
JournalJournal of High Energy Physics
Issue number8
Publication statusPublished - 26 Aug 2022


  • hep-ph


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