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arXiv · 2306.03682

Measuring Hadronic Higgs Boson Branching Ratios at Future Lepton Colliders

Max Knobbe·Frank Krauss·Daniel Reichelt·Steffen Schumann
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Abstract

We present a novel strategy for the simultaneous measurement of Higgs-boson branching ratios into gluons and light quarks at a future lepton collider operating in the Higgs-factory mode. Our method is based on template fits to global event-shape observables, and in particular fractional energy correlations, thereby exploiting differences in the QCD radiation patterns of quarks and gluons. In a constrained fit of the deviations of the light-flavour hadronic Higgs-boson branching ratios from their Standard Model expectations, based on an integrated luminosity of $5\,\text{ab}^{-1}$, we obtain $68\%$ confidence level limits of $\mu_{gg}=1 \pm 0.05$ and $\mu_{q\bar{q}}<21$.

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Max Knobbe, Frank Krauss, Daniel Reichelt, Steffen Schumann. 2023-06-06. Measuring Hadronic Higgs Boson Branching Ratios at Future Lepton Colliders. https://arxiv.org/abs/2306.03682

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