The leptonic future of the Higgs
Gauthier Durieux, Christophe Grojean, Jiayin Gu, Kechen Wang
TL;DR
This paper evaluates the potential of future lepton colliders to precisely measure Higgs and electroweak processes, using a global effective-field-theory approach to compare different collider designs.
Contribution
It introduces a global determinant parameter (GDP) to quantify the overall constraint improvements and assesses the reach of various proposed collider projects.
Findings
Future colliders can significantly improve Higgs and electroweak measurements.
Differential measurements at different energies enhance constraint precision.
The GDP provides a basis-independent measure of constraint strength.
Abstract
Precision study of electroweak symmetry breaking strongly motivates the construction of a lepton collider with center-of-mass energy of at least 240 GeV. Besides Higgsstrahlung (), such a collider would measure weak boson pair production () with an astonishing precision. The weak-boson-fusion production process () provides an increasingly powerful handle at higher center-of-mass energies. High energies also benefit the associated top-Higgs production () that is crucial to constrain directly the top Yukawa coupling. The impact and complementarity of differential measurements, at different center-of-mass energies and for several beam polarization configurations, are studied in a global effective-field-theory framework. We define a "global determinant parameter" (GDP) which characterizes the overall strengthening…
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