Jet mass distribution in Higgs/vector boson plus jet events at hadron colliders with kt clustering

We address the issues of clustering and nonglobal logarithms for jet shapes in the process of production of a Higgs/vector boson associated with a single hard jet at hadron colliders. We perform an analytical fixed-order calculation up to second order in the coupling as well as an allorders estimation for the specific invariant mass distribution of the highest- p(t) jet, for various jet algorithms. Our results are derived in the eikonal (soft) limit and are valid up to next-to-leading logarithmic accuracy. We perform a matching of the resummed distribution to next-to-leading order results from MCFM and compare our findings with the outputs of the Monte Carlo event generators Pythia 8 and Herwig 7. After accounting for non-perturbative effects we compare our results with available experimental data from the CMS collaboration for the Z + jet production. We find good agreement over a wide range of the observable.

Automated summary

In this study, we address the issues of clustering and nonglobal logarithms for jet shapes in the process of Higgs/vector boson production with a single hard jet at hadron colliders. We performed both analytical fixed-order calculations and all-orders estimations for the specific invariant mass distribution of the highest-p(t) jet, using various jet algorithms. Our results, derived in the eikonal (soft) limit, show good agreement with next-to-leading order results and experimental data from the CMS collaboration after accounting for non-perturbative effects.