Double Higgs production from $HH\to(b\bar{b})(b\bar{b})$ at a 100 TeV hadron collider

TL;DR

This paper evaluates the feasibility of measuring double Higgs production at a future 100 TeV collider, highlighting the challenges due to low signal-to-background ratio despite advanced analysis techniques.

Contribution

It introduces an analysis method combining multiple Higgs decay topologies and neural network classification for double Higgs production at 100 TeV colliders.

Findings

Significant potential at HL-LHC for double Higgs measurement.

Poor signal-to-background ratio at 100 TeV collider.

Measurement at FCC is more challenging than at HL-LHC.

Abstract

In this contribution we study the prospects of measuring double Higgs production at a potential 100 TeV future circular collider. We apply an analysis procedure that utilises reconstructed Higgs pairs from multiple final state event topologies in order to maintain high selection efficiencies. Signal purity is then further improved by means of a artificial neural network classifier. The results of this analysis for the high luminosity LHC show significant potential, however when applied to a 100 TeV hadron collider we find that such a measurement is likely to suffer from a very poor signal to background ratio. Such a measurement at the FCC is therefore likely to be significantly more challenging than at the high luminosity phase of the LHC.