Limits on new strongly interacting matter from measurements of Transverse Energy-Energy Correlations at $\sqrt{s} = 13$ TeV at the LHC

TL;DR

This paper uses precise measurements of Transverse Energy-Energy Correlations at the LHC to set 95% confidence limits on models with new strongly interacting fermions up to 4 TeV, independent of their decay assumptions.

Contribution

It provides the first experimental constraints on models with additional strongly interacting fermions using transverse energy correlations at 13 TeV.

Findings

Constraints on new fermion models up to 4 TeV mass

Use of NNLO theoretical predictions for comparison

Establishment of 95% confidence level limits

Abstract

This work establishes 95% confidence level limits to models incorporating additional fermions sensitive to the strong interaction. Precision measurements of Transverse Energy-Energy Correlations at the ATLAS experiment are used, exploiting their dependence on the strong coupling constant to analyse the effects of introducing new fermions with colour charge on the Renormalisation Group Equation. The comparison between theoretical predictions, corrected up to next-to-next-to-leading order, and the data collected by ATLAS at $\sqrt{s} = 13$ TeV allows to constrain physics models proposing the existence of new fermions with masses up to 4 TeV, independently of assumptions on the fermion decay.