Spying an invisible Higgs

TL;DR

This paper explores advanced multivariate analysis techniques to enhance the detection sensitivity of invisible Higgs decays at the LHC, projecting significant improvements in measurement precision with future runs.

Contribution

It demonstrates the potential of multivariate methods and QCD radiation pattern analysis to significantly improve the LHC's sensitivity to invisible Higgs decays.

Findings

LHC can probe an invisible Higgs width of 28% in one year

High luminosity runs can reach 3.5% sensitivity

Analysis of QCD radiation patterns can improve reach to 2%

Abstract

We investigate the potential of multivariate techniques to improve the LHC search for invisible Higgs decays in weak boson fusion. We find that in the coming runs the LHC will be able to probe an invisible Higgs width of 28% within a year and 3.5% during a high luminosity run. A significant improvement over these estimates requires an analysis of QCD radiation patterns down to 10 GeV. Such an analysis can improve the reach at the high luminosity run to 2%. Throughout our analysis we employ a conservative, data driven background determination.