Mad-Maximized Higgs Pair Analyses

TL;DR

This paper analyzes Higgs pair production at the LHC, focusing on separating signal from background and measuring the Higgs self-coupling using likelihood methods, with implications for future colliders.

Contribution

It introduces a likelihood-based approach to identify kinematic regions for Higgs pair analysis and assesses the precision of self-coupling measurement at current and future colliders.

Findings

Distinct kinematic regions for signal-background separation

Background modeling does not significantly affect self-coupling determination

Projected precision of Higgs self-coupling measurement at 14 TeV and 100 TeV

Abstract

We study Higgs pair production with a subsequent decay to a pair of photons and a pair of bottoms at the LHC. We use the log-likelihood ratio to identify the kinematic regions which either allow us to separate the di-Higgs signal from backgrounds or to determine the Higgs self-coupling. We find that both regions are separate enough to ensure that details of the background modelling will not affect the determination of the self-coupling. Assuming dominant statistical uncertainties we determine the best precision with which the Higgs self- coupling can be probed in this channel. We finally comment on the same questions at a future 100 TeV collider.