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.
Alioli, S., Broggio, A., Gavardi, A., Kallweit, S., Lim, M., Nagar, R., et al. (2021). Resummed predictions for hadronic Higgs boson decays. JOURNAL OF HIGH ENERGY PHYSICS, 2021(4) [10.1007/JHEP04(2021)254].
Resummed predictions for hadronic Higgs boson decays
Simone Alioli
;Alessandro Broggio;Alessandro Gavardi;Stefan Kallweit;Riccardo Nagar;Davide Napoletano;Luca Rottoli
2021
Abstract
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.
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