Higgs couplings: disentangling New Physics with off-shell measurements

Abstract

After the discovery of a scalar resonance, resembling the Higgs boson, its couplings have been extensively studied via the measurement of various production and decay channels on the invariant mass peak. Recently, it has been suggested the possibility to use off-shell measurements: in particular, CMS has published results based on the high- invariant mass cross section of the process $gg\to ZZ$, which contains the contribution of the Higgs. While this measurement has been interpreted as a constraint on the Higgs width after very specific assumptions are taken on the Higgs couplings, in this letter we show that a much more model-independent interpretation is possible.

6pp, 1 figure

References in corpus (3)

• Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
• LHC HXSWG interim recommendations to explore the coupling structure of a Higgs-like particle
• Limitations and Opportunities of Off-Shell Coupling Measurements

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• Higgs constraints from vector boson fusion and scattering
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• Off-shell effects in Higgs processes at a linear collider and implications for the LHC
• Extracting the Top-Quark Width from Non-Resonant Production