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

Author(s)
Massimiliano Procura, Wouter J. Waalewijn, Lisa Zeune
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.

Organisation(s)
Particle Physics
External organisation(s)
Johannes Gutenberg-Universität Mainz, University of Amsterdam (UvA), NIKHEF (Nationaal instituut voor subatomaire fysica), European Organization for Nuclear Research (CERN)
Journal
Journal of High Energy Physics
Volume
10
No. of pages
41
ISSN
1029-8479
DOI
https://doi.org/10.1007/JHEP10(2018)098
Publication date
2018
Peer reviewed
Yes
Austrian Fields of Science 2012
103034 Particle physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/joint-resummation-of-two-angularities-at-nexttonexttoleading-logarithmic-order(d2ed0678-5b8f-493e-a1b7-b000e9cf59dd).html