Dynamical Symmetry Breaking in a Minimal 3-3-1 Model

Abstract

The gauge symmetry breaking in some versions of 3-3-1 models can be implemented dynamically because at the scale of a few TeVs the $U(1)_X$ coupling constant becomes strong. In this work we consider the dynamical symmetry breaking in a minimal $SU(3)_{{}_{TC}}\times SU(3)_{{}_{L}}\times U(1)_{X}$ model, where we propose a new scheme to cancel the chiral anomalies, including two-index symmetric (6) technifermions, which incorporates naturally the walking behavior in the TC sector. The composite scalar content of the model is minimal and all the symmetry breaking is implemented by a multiplet of technifermions. The choice of TC representations not only provide the anomaly cancellation with a walking behavior, but is crucial to promote the model's full dynamical symmetry breaking. We consider the dynamical generation of technigluon masses and, depending on the 3-3-1 symmetry breaking scale ($\mu_{331}$), we verify that the technigluon mass is strongly linked to the $Z'$ mass scale, for instance, if $\mu_{331}= 1TeV$, we have $M_{{}_{Z'}} > 1$ TeV only if $M_{{}_{TG}} < 350GeV$.