Probing new physics in the Boosted $HH \to b\bar{b}\gamma\gamma$ channel at the LHC

TL;DR

This study investigates the boosted $HH o b\bar{b}\gamma\gamma$ channel at the LHC to explore physics beyond the Standard Model, focusing on non-resonant and resonant new physics scenarios, and demonstrates improved sensitivity in the high-mass regime.

Contribution

It provides the first dedicated analysis of the boosted $HH$ decay channel for probing non-resonant and resonant new physics effects at the LHC.

Findings

Boosted reconstruction improves sensitivity to high-mass $HH$ events.

Enhanced constraints on the quartic gauge--Higgs coupling modifier $\kappa_{2V}$.

Extended discovery potential for heavy scalar resonances.

Abstract

This paper presents the first dedicated study of the boosted $HH \to b\bar{b}\gamma\gamma$ topology as a key probe of physics beyond the Standard Model (SM) in the high-energy double-Higgs boson regime. The analysis presented in this paper, focuses on two classes of new-physics scenarios: non-resonant deviations of the quartic gauge--Higgs interaction, parameterized by the coupling modifier $\kappa_{2V}$, and resonant enhancement arising from the decay of a heavy scalar state, modeled within a two-Higgs-doublet framework. We demonstrate that the boosted reconstruction category enhances sensitivity to beyond SM effects that populate the high-$m_{HH}$ tail, yielding improved constraints on $\kappa_{2V}$ and extending the discovery reach for heavy resonances.