Resummed predictions for hadronic Higgs boson decays

• DOI: 10.1007/jhep04(2021)254
• Publication Date: 2021-04-28T03:43:50Z
• Authors: Simone Alioli; Alessandro Broggio; Alessandro Gavardi; Stefan Kallweit; Matthew A. Lim; Riccardo Nagar; Davide Napoletano; Luca Rottoli
• Keywords: Nuclear and High Energy Physics; 530 Physics; FOS: Physical sciences; 10192 Physics Institute; QC770-798; QCD Phenomenology; NLO Computations; QCD Phenomenology;; 01 natural sciences; High Energy Physics - Experiment; High Energy Physics - Phenomenology; High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph); NLO Computations; Nuclear and particle physics. Atomic energy. Radioactivity; 0103 physical sciences

Abstract We present the NNLL′ resummed 2-jettiness distribution for decays of the Standard Model Higgs boson to a b$$ \overline{b} $$

b ¯

-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.