Limit on Higgs boson trilinear self-coupling in coupled technicolor models

TL;DR

This paper compares the Higgs boson trilinear self-coupling in composite models with experimental bounds, constraining technicolor dynamics and predicting that associated pseudo-Goldstone bosons are likely very massive.

Contribution

It provides the first experimental constraint on the Higgs self-coupling within coupled technicolor models, linking it to technifermion dynamics and mass parameters.

Findings

Experimental bounds restrict technicolor model parameters.

Constraints imply pseudo-Goldstone bosons are expected to be heavy.

The analysis connects Higgs self-coupling to technifermion self-energy expressions.

Abstract

The trilinear self-coupling of the Higgs boson, in a theory in which this boson is composite, is compared to the experimental bound of this quantity obtained by the CMS experiment. In the case of a model where technicolor (TC) is coupled to QCD, we find that the experimental result already constrain the dynamics of the theory, which is represented by an expression of the technifermion self-energy ($\Sigma_{tc}$) typical of technicolor coupled models, and function of the dynamically generated technifermion mass and two other parameters that describe the technifermion dynamical mass momentum dependence. The limits imposed on this dynamics allow us to make a simple determination of pseudo-Goldstone boson masses that appear in these theories, indicating that these bosons may be expected to be quite massive.