Discovering Walking Technicolor at LHC and Lattice

TL;DR

This paper explores how walking technicolor theories predict a light composite Higgs boson, the Technidilaton, which can be consistent with the 125 GeV boson observed at LHC, supported by theoretical models and lattice simulations.

Contribution

It demonstrates the dynamical realization of a light scalar in strongly coupled theories and compares theoretical predictions with lattice results searching for such states.

Findings

Identification of a light scalar consistent with the Higgs at LHC

Lattice evidence for a walking theory with a light flavor-singlet scalar

Theoretical models support Technidilaton as a pseudo-Nambu-Goldstone boson

Abstract

Walking technicolor, having a large anomalous dimension $\gamma_m \simeq 1$ and approximate scale symmetry, predicts Technidilaton, a light composite Higgs as a pseudo-Nambu-Goldstone boson of the approximate scale symmetry, which can be identified with the 125 GeV boson discovered at LHC. I will describe how such a {\it weakly coupled light composite scalar} can be dynamically realized in the {\it strongly coupled dynamics}, and can be fit to the current data at LHC, based on the ladder-like computation and the holographic one. I will also present results of our lattice collaboration (LatKMI Collaboration) searching for a walking theory and a light flavor-singlet scalar bound state in large $N_f$ QCD.