Field theory as a tool to constrain new physics models

TL;DR

This paper explores how field-theoretical principles, especially the Frohlich-Morchio-Strocchi mechanism, can impose additional constraints on new physics models like 2-Higgs-doublet models and technicolor theories, beyond perturbative limits.

Contribution

It introduces a non-perturbative approach using field theory to constrain the parameter space of various beyond Standard Model theories.

Findings

Field-theoretical constraints can restrict model parameters.

The Frohlich-Morchio-Strocchi mechanism provides non-perturbative conditions.

Qualitative analysis for multiple new physics scenarios.

Abstract

One of the major problems in developing new physics scenarios is that very often the parameters can be adjusted such that in perturbation theory almost all experimental low-energy results can be accommodated. It is therefore desirable to have additional constraints. Field-theoretical considerations can provide such additional constraints on the low-lying spectrum and multiplicities of models. Especially for theories with elementary or composite Higgs particle the Fr\"ohlich-Morchio-Strocchi mechanism provides a route to create additional conditions, though showing it to be at work requires genuine non-perturbative calculations. The qualitative features of this procedure are discussed for generic 2-Higgs-doublet models, grand-unified theories, and technicolor-type theories.