BSM patterns in scalar-sector coupling modifiers

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 $\hat{I}{º}_V$, $\hat{I}{º}_{2V}$, and $\hat{I}{º}_{\hat{I}}»$. 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 $\hat{I}{º}_{2V}$. We explore the landscape of BSM models in the space of deviations in $\hat{I}{º}_V$, $\hat{I}{º}_{2V}$, and $\hat{I}{º}_{\hat{I}}»$, highlighting models that have measurable order-of-magnitude enhancements in either $\hat{I}{º}_{2V}$ or $\hat{I}{º}_{\hat{I}}»$, relative to their deviation in the single Higgs coupling $\hat{I}{º}_V$.

32 pages, 7 figures, 2 tables