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arXiv · 2310.09354

Four-jet event shapes in hadronic Higgs decays

Aude Gehrmann-De Ridder·Christian T Preuss·Ciaran Williams
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Abstract

We present next-to-leading order perturbative QCD predictions for four-jet-like event-shape observables in hadronic Higgs decays. To this end, we take into account two Higgs-decay categories: involving either the Yukawa-induced decay to a $b\bar{b}$ pair or the loop-induced decay to two gluons via an effective Higgs-gluon-gluon coupling. We present results for distributions related to the event-shape variables thrust minor, light-hemisphere mass, narrow jet broadening, $D$-parameter, and Durham four-to-three-jet transition variable. For each of these observables we study the impact of higher-order corrections and compare their size and shape in the two Higgs-decay categories. We find large NLO corrections with a visible shape difference between the two decay modes, leading to a significant shift of the peak in distributions related to the $H\to gg$ decay mode.

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Aude Gehrmann-De Ridder, Christian T Preuss, Ciaran Williams. 2023-10-13. Four-jet event shapes in hadronic Higgs decays. https://arxiv.org/abs/2310.09354

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