Phenomenology of jet angularities at the LHC

We compute resummed and matched predictions for jet angularities in hadronic dijet and Z+jet events with and without grooming the candidate jets using the SoftDrop technique. Our theoretical predictions also account for non-perturbative corrections from the underlying event and hadronisation through parton-to-hadron level transfer matrices extracted from dedicated Monte Carlo simulations with Sherpa. Thanks to this approach we can account for non-perturbative migration effects in both the angularities and the jet transverse momentum. We compare our predictions against recent measurements from the CMS experiment. This allows us to test the description of quark- and gluon-jet enriched phase-space regions separately. We supplement our study with Sherpa results based on the matching of NLO QCD matrix elements with the parton shower. Both theoretical predictions offer a good description of the data, within the experimental and theoretical uncertainties. The latter are however sizeable, motivating higher-accuracy calculations.

Automated summary

In this study, resummed and matched predictions for jet angularities in hadronic dijet and Z+jet events with and without grooming candidate jets using the SoftDrop technique are computed. The theoretical predictions consider non-perturbative corrections and parton-to-hadron level transfer matrices. Comparisons with recent measurements from the CMS experiment show that both theoretical predictions offer a good description of the data within experimental and theoretical uncertainties, highlighting the need for higher-accuracy calculations.