Status of a minimal composite Higgs theory

TL;DR

This paper investigates a minimal composite Higgs model using lattice gauge theory, focusing on chiral symmetry breaking, scalar mass, resonance spectrum, and implications for dark matter and LHC signals, providing preliminary results for a BSM gauge theory.

Contribution

It presents new lattice simulation results on a BSM SU(3) gauge theory with a sextet fermion doublet, exploring scalar properties, resonance spectrum, and dark matter implications in a minimal composite Higgs framework.

Findings

Chiral symmetry breaking confirmed in p- and epsilon-regimes

Preliminary scalar mass estimates near 750 GeV

Resonance spectrum analysis related to LHC anomalies

Abstract

We analyze three sets of gauge ensembles in our extended physics program of a particularly important BSM gauge theory with a fermion doublet in the two-index symmetric (sextet) representation of the SU(3) BSM color gauge group. Our investigations include chiral symmetry breaking $\rm{(\chi SB)}$ in the p-regime and $\epsilon$-regime, the mass of the composite ${\rm 0^{++}}$ scalar, resonance spectroscopy, new physics from gauge anomaly constraints, and the role of stable sextet BSM baryons with Electroweak interactions in dark matter searches. Important new goals include studies of the ${\rm 0^{++}}$ scalar entangled with Goldstone dynamics in the p-regime and the $\epsilon$-regime, the resonance spectrum with particular attention to emerging LHC signals, like recent hints for diphoton excess at 750 GeV or diboson anomalies in the 2 TeV range. All results reported here are preliminary before journal publication including some post-conference material for the discussion.