Strongly interacting dynamics and the search for new physics at the LHC

TL;DR

This paper reports non-perturbative lattice calculations of an SU(3) gauge theory with 8 light fermions, revealing a light scalar and predicting new resonances around 2-3 TeV relevant for LHC searches.

Contribution

It provides the first lattice results at the lightest masses and largest volumes for this theory, confirming a light scalar and estimating resonance masses for new physics searches.

Findings

Existence of a remarkably light singlet scalar particle.

Vector resonance mass estimated at about 2 TeV.

Additional resonances predicted below ~3 TeV.

Abstract

We present results for the spectrum of a strongly interacting SU(3) gauge theory with $N_f = 8$ light fermions in the fundamental representation. Carrying out non-perturbative lattice calculations at the lightest masses and largest volumes considered to date, we confirm the existence of a remarkably light singlet scalar particle. We explore the rich resonance spectrum of the 8-flavor theory in the context of the search for new physics beyond the standard model at the Large Hadron Collider (LHC). Connecting our results to models of dynamical electroweak symmetry breaking, we estimate the vector resonance mass to be about 2 TeV with a width of roughly 450 GeV, and predict additional resonances with masses below ~3 TeV.