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The top-quark window on compositeness at future lepton colliders
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In composite Higgs (CH) models, large mixings between the top quark and the new strongly interacting sector are required to generate its sizeable Yukawa coupling. Precise measurements involving top as well as left-handed bottom quarks therefore offer an interesting opportunity to probe such new physics scenarios. We study the impact of third-generation-quark pair production at future lepton colliders, translating prospective effective-field-theory sensitivities into the CH parameter space. Our results show that one can probe a significant fraction of the natural CH parameter space through the top portal, especially at TeV centre-of-mass energies.
Forward citations
Cited by 2 Pith papers
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Top-quark Partial Compositeness beyond the effective field theory paradigm
In a simplified partial-compositeness model, energy-dependent gluon form factors suppress heavy top partner production by up to an order of magnitude and add a few-percent distortion to quark-initiated top pair production.
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Tests of the Standard Model at the International Linear Collider
The paper projects that a polarized e+e- collider at 250 GeV to 1 TeV would measure most Higgs couplings to sub-percent precision and improve many electroweak observables by an order of magnitude.
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