Snowmass 2021 White Paper: Higgs Coupling Sensitivities and Model-Independent Bounds on the Scale of New Physics

TL;DR

This paper discusses how unitarity bounds can translate future collider sensitivities on Higgs couplings into model-independent limits on the scale of new physics, aiding the planning of next-generation colliders.

Contribution

It introduces a method to convert Higgs coupling sensitivities into bounds on new physics scales using unitarity, independent of specific models.

Findings

Unitarity bounds provide a way to set model-independent limits on new physics.

Improved Higgs coupling measurements tighten constraints on new physics scales.

The approach can guide future collider design and physics goals.

Abstract

In this Snowmass white paper, we describe how unitarity bounds can convert sensitivities for Higgs couplings at future colliders into sensitivities to the scale of new physics. This gives a model-independent consequence of improving these sensitivities and illustrate the impact they would have on constraining new physics. Drawing upon past successful applications of unitarity as a guide for future colliders (e.g. the Higgs mass bound and discovering it at the LHC), we hope this data will be useful in the planning for next generation colliders.