Resummed predictions for hadronic Higgs boson decays

We present the NNLL ' resummed 2-jettiness distribution for decays of the Standard Model Higgs boson to a bb-quark pair and to gluons. The calculation exploits a factorisation formula derived using Soft-Collinear Effective Theory, in which large logarithms of the 2-jettiness are resummed by renormalisation group evolution of the hard, soft and jet contributions to the differential decay rate. We match the resummed predictions to the fixed-order NNLO result using the Geneva framework, extending the validity of the results to all values of the resolution variable and providing a fully exclusive NNLO event generator matched to the Pythia8 parton shower.

Automated summary

In this paper, the NNLL' resummed 2-jettiness distribution for decays of the Standard Model Higgs boson to a bb-quark pair and to gluons is presented. The calculation relies on a factorisation formula derived using Soft-Collinear Effective Theory, where large logarithms of the 2-jettiness are resummed by renormalisation group evolution. The resummed predictions are matched to the fixed-order NNLO result using the Geneva framework, extending the validity of the results and providing a fully exclusive NNLO event generator matched to the Pythia8 parton shower.