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<p>We present NNLO QCD predictions for a wide range of event-shape observables in hadronic Higgs decays, taking into account the two dominant decay modes <i>H</i> → <i>gg</i> and <InlineEquation ID="IEq1"> <EquationSource Format="MATHML"><math display="inline"> <mi>H</mi> <mo>→</mo> <mi>b</mi> <mover accent="true"> <mi>b</mi> <mo stretchy="true">¯</mo> </mover> </math></EquationSource> <EquationSource Format="TEX">\( H\to b\overline{b} \)</EquationSource> </InlineEquation>. Specifically, we consider the six classical event shapes thrust, heavy jet mass, <i>C</i>-parameter, total and wide jet broadening, and the three-jet resolution <i>y</i><sub>23</sub> in the Durham algorithm. We also present results for the soft-drop variant of thrust. Decays of the Higgs boson to two gluons are treated in the heavy-top limit, whereas decays to a bottom-quark pair are mediated by a non-vanishing Yukawa coupling, despite considering kinematically massless quarks. Our results highlight the importance of NNLO QCD corrections in the calculation of event-shape observables in hadronic Higgs decays.</p>

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Precise predictions for event shapes in hadronic Higgs decays

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月26日

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  • Elliot Fox,
  • Aude Gehrmann-De Ridder,
  • Thomas Gehrmann,
  • Nigel Glover,
  • Matteo Marcoli,
  • Christian T. Preuss

摘要

We present NNLO QCD predictions for a wide range of event-shape observables in hadronic Higgs decays, taking into account the two dominant decay modes H → gg and H → b b ¯ \( H\to b\overline{b} \) . Specifically, we consider the six classical event shapes thrust, heavy jet mass, C-parameter, total and wide jet broadening, and the three-jet resolution y23 in the Durham algorithm. We also present results for the soft-drop variant of thrust. Decays of the Higgs boson to two gluons are treated in the heavy-top limit, whereas decays to a bottom-quark pair are mediated by a non-vanishing Yukawa coupling, despite considering kinematically massless quarks. Our results highlight the importance of NNLO QCD corrections in the calculation of event-shape observables in hadronic Higgs decays.