Studies of measuring Higgs self-coupling with $HH\rightarrow b\bar b \gamma\gamma$ at the future hadron colliders

TL;DR

This study assesses the potential to measure Higgs self-coupling via the $HH o bar{b}\gamma\gamma$ channel at future hadron colliders with energies of 14, 33, and 100 TeV, using fast simulation methods.

Contribution

It provides a detailed feasibility analysis of measuring Higgs self-coupling at future colliders through a specific decay channel, including estimated precision levels.

Findings

At 14 TeV, 50% accuracy in Higgs self-coupling measurement.

At 33 TeV, 20% accuracy achievable.

At 100 TeV, Higgs self-coupling can be measured with 8% precision.

Abstract

We present a feasibility study of observing $HH\rightarrow b\bar b\gamma\gamma$ at the future hadron colliders with $\sqrt{s}=$14, 33, and 100 TeV. The measured cross section then can be used to constrain the Higgs self-coupling directly in the standard model. Any deviation could be a sign of new physics. The signal and background events are estimated using Delphes 3.0.10 fast Monte Carlo simulation based on the ATLAS detector capabilities. With 3 ab$^{-1}$ data, it would be possible to measure the Higgs self-coupling with a 50%, 20%, and 8% statistical accuracy by observing $HH\rightarrow b\bar b\gamma\gamma$ at $\sqrt{s}=$14, 33, and 100 TeV colliders, respectively.