Joint resummation of two angularities at next-to-next-to-leading logarithmic order

Massimiliano Procura (Corresponding author), Wouter J. Waalewijn, Lisa Zeune

Publications: Contribution to journalArticlePeer Reviewed

Abstract

Multivariate analyses are emerging as important tools to understand properties of hadronic jets, which play a key role in the LHC experimental program. We take a first step towards precise and differential theory predictions, by calculating the cross section for e(+)e(-) -> 2 jets differential in the angularities e(alpha) and e(beta). The logarithms of eff and e(alpha) in the cross section are jointly resummed to next-to-next-to-leading logarithmic accuracy, using the SCET + framework we developed, and are matched to the next-to-leading order cross section. We perform analytic one-loop calculations that serve as input for our numerical analysis, provide controlled theory uncertainties, and compare our results to Pythia. We also obtain predictions for the cross section di ff erential in the ratio eff=e(beta), which cannot be determined from a fi xed-order calculation. The effect of nonperturbative corrections is also investigated. Using Event2, we validate the logarithmic structure of the single angularity cross section predicted by factorization theorems at O (alpha(2)(s)), highlighting the importance of recoil for specific angularities when using the thrust axis as compared to the winner-take-all axis.
Original languageEnglish
Article number98
Number of pages41
JournalJournal of High Energy Physics
Volume2018
Issue number10
DOIs
Publication statusPublished - 2018

Austrian Fields of Science 2012

  • 103034 Particle physics

Keywords

  • QCD, collider physics
  • CROSS-SECTIONS
  • FACTORIZATION
  • EVENT SHAPES
  • ALGORITHM
  • COLLINEAR EFFECTIVE THEORY
  • POWER CORRECTIONS
  • DECAYS
  • E+E-ANNIHILATION
  • EFFECTIVE-FIELD THEORY
  • QCD
  • QCD Phenomenology
  • Jets

Fingerprint

Dive into the research topics of 'Joint resummation of two angularities at next-to-next-to-leading logarithmic order'. Together they form a unique fingerprint.

Cite this