Sensitivity to the Higgs Self-coupling Using the ZHH Channel

TL;DR

This paper evaluates the potential to measure the Higgs self-coupling at a future collider using the ZHH to six jets channel, finding a cross section resolution of about 180%, and discusses possible improvements.

Contribution

It provides a detailed simulation-based analysis of the sensitivity to the Higgs self-coupling in the ZHH channel at the proposed International Linear Collider.

Findings

Cross section resolution is approximately 180%.

Full simulation was performed for 500fb^{-1} luminosity.

Potential improvements for measurement accuracy are identified.

Abstract

The Standard Model predicts the value of the Higgs self-coupling but it cannot be measured at LHC. This measurement requires a machine such as the proposed International Linear Collider. Here, the sensitivity to the Higgs self-coupling is evaluated using the ZHH to six jets channel for a Higgs mass of 120GeV/c^{2}. Full simulation has been carried out for an integrated luminosity of 500fb^{-1}. Several analyses are presented and all evaluate the cross section resolution to be about 180% . Potential areas for improvement are identified.