Resummed predictions for hadronic Higgs boson decays
2020
We present the NNLL$'$ resummed \mbox{$2$-jettiness}\xspace distribution for decays of the Standard Model Higgs boson to a $b\bar{b}$-quark pair and to gluons. The calculation exploits a factorisation formula derived using Soft-Collinear Effective Theory, in which large logarithms of the \mbox{$2$-jettiness}\xspace 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 \textsc{Geneva}\xspace 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 \textsc{Pythia8}\xspace parton shower.
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