A combined fit to the Higgs branching ratios at the International Large Detector at ILC
March 02, 2022
The Higgsstrahlung process as a Higgs boson production mechanism at a lepton collider provides
access to a high-purity Higgs boson sample. The Higgs branching ratios can be measured
simultaneously by analysing the data inclusively. For this purpose, we divide the sample into
classes that distinguish reasonably well between the Higgs decay modes. These class counts
are associated to the Higgs branching ratios through a model-independent fit. The fit provides
an estimate for each of the Higgs branching ratios with the full matrix of statistical correlations
between the channels. These are pure branching ratio measurements, independent of any Higgs
production mode cross section measurement.
We present a study on data simulated for the ILD concept at the International Linear Collider
(ILC) at 250 GeV center-of-mass energy.
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