Higgs self-coupling measurements at the LHC

TL;DR

This paper explores the potential to measure the Higgs self-coupling at the LHC for a 125 GeV Higgs boson, using boosted and unboosted decay channels and jet recoil techniques to improve sensitivity.

Contribution

It introduces a novel analysis strategy combining boosted and unboosted regimes with jet recoil to enhance Higgs self-coupling measurement sensitivity at the LHC.

Findings

Enhanced sensitivity through dihiggs systems recoiling against a hard jet

Potential to set constraints on the Higgs self-coupling at the LHC

Analysis of dominant SM decay channels in various kinematic regimes

Abstract

Both the ATLAS and CMS collaborations have reported a Standard Model Higgs-like excess at around $m_h = 125$ GeV. If an SM-like Higgs particle is discovered in this particular mass range, an important additional test of the SM electroweak symmetry breaking sector is the measurement of the Higgs self-interactions. We investigate the prospects of measuring the Higgs self-coupling for $m_h=125 \gev$ in the dominant SM decay channels in boosted and unboosted kinematical regimes. We further enhance sensitivity by considering dihiggs systems recoiling against a hard jet. This configuration exhibits a large sensitivity to the Higgs self-coupling which can be accessed in subjet-based analyses. Combining our analyses allows constraints to be set on the Higgs self-coupling at the LHC.