NLO+NLL′ accurate predictions for three-jet event shapes in hadronic Higgs decays

Gehrmann-De Ridder, Aude; Preuss, Christian T.; Reichelt, Daniel; Schumann, Steffen

Abstract

We present resummed predictions at next-to-leading logarithmic accuracy matched to the exact next-to-leading order results for a set of classical event-shape observables in hadronic Higgs decays, i.e., for the channels H → gg and H → bb¯. We furthermore consider soft-drop grooming of the hadronic final states and derive corresponding NLO+NLL′ predictions for the groomed thrust observable. Differences in the QCD radiation pattern of gluon- and quark-initiated final states are imprinted in the event-shape distributions, offering separation power for the two decay channels. In particular, we show that ungroomed event shapes in H → gg decays develop a considerably harder spectrum than in H → bb¯ decays. We highlight that soft-drop grooming can substantially alter this behaviour, unless rather inclusive grooming parameters are chosen.

Citation

Gehrmann-De Ridder, A., Preuss, C. T., Reichelt, D., & Schumann, S. (2024). NLO+NLL′ accurate predictions for three-jet event shapes in hadronic Higgs decays. Journal of High Energy Physics, 2024(7), Article 160. https://doi.org/10.1007/jhep07%282024%29160

• Journal Article Type: Article
• Acceptance Date: Jun 16, 2024
• Online Publication Date: Jul 18, 2024
• Publication Date: Jul 18, 2024
• Deposit Date: Jul 31, 2024
• Publicly Available Date: Jul 31, 2024
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2024
• Issue: 7
• Article Number: 160
• DOI: https://doi.org/10.1007/jhep07%282024%29160
• Keywords: Resummation, Higgs Production, Higher-Order Perturbative Calculations, Higgs Properties
• Public URL: https://durham-repository.worktribe.com/output/2614737