As part of our ongoing lattice study of SU(3) gauge theory with two flavors of fermions in the two-index symmetric representation (the sextet model), we present the current status of the pseudoscalar particle spectrum. We use a mixed action approach based on the gradient flow to control lattice artifacts, allowing a simultaneous extrapolation to the chiral and continuum limits. We find strong evidence that the pseudoscalar is a Goldstone boson state, with spontaneously broken chiral symmetry and a non-zero Goldstone decay constant in the chiral limit. In agreement with our study of the gauge coupling β function, we find the sextet model appears to be a near-conformal gauge theory and serves as a prototype of the composite Higgs BSM template.
|Original language||English (US)|
|Journal||EPJ Web of Conferences|
|State||Published - Mar 26 2018|
|Event||35th International Symposium on Lattice Field Theory, Lattice 2017 - Granada, Spain|
Duration: Jun 18 2017 → Jun 24 2017
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)