BSM patterns in scalar-sector coupling modifiers

TL;DR

This paper analyzes how measurements of Higgs pair production at colliders can reveal deviations in scalar sector couplings, offering potential to distinguish beyond Standard Model physics through coupling modifiers.

Contribution

It estimates collider sensitivity to Higgs coupling modifiers and explores BSM models with significant deviations in these parameters.

Findings

Future colliders can significantly improve BSM discrimination in $oldsymbol{\kappa_{2V}}$

Certain BSM models predict order-of-magnitude enhancements in $oldsymbol{\kappa_{2V}}$ or $oldsymbol{\kappa_ ext{lambda}}$

Current measurements are statistically limited but theoretically controlled

Abstract

We consider what multiple Higgs interactions may yet reveal about the scalar sector. We estimate the sensitivity of a Feynman topology-templated analysis of weak boson Higgs pair production at present and future colliders - where the signal is a function of the Higgs coupling modifiers $\kappa_V$, $\kappa_{2V}$, and $\kappa_\lambda$. While measurements are statistically limited at the LHC, they are under general perturbative control at present and future colliders, departures from the SM expectation give rise to a significant future potential for BSM discrimination in $\kappa_{2V}$. We explore the landscape of BSM models in the space of deviations in $\kappa_V$, $\kappa_{2V}$, and $\kappa_\lambda$, highlighting models that have measurable order-of-magnitude enhancements in either $\kappa_{2V}$ or $\kappa_\lambda$, relative to their deviation in the single Higgs coupling $\kappa_V$.