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The ATLAS collaboration reported excesses at around 2 TeV in the di-bosonproduction decaying into hadronic final states. We consider the possibility ofexplaining the excesses with extra gauge bosons in two simple non-Abelianextensions of the Standard Model. One is the so-called $G(221)$ models with asymmetry structure of $SU(2)_1\otimes SU(2)_2\otimes U(1)_X$ and the other isthe $G(331)$ models with an extended symmetry of $SU(3)_C\otimes SU(3)_L\otimesU(1)_X$. The $W'$ and $Z'$ bosons emerge after the electroweak symmetry isspontaneously broken. Two patterns of symmetry breaking in the $G(221)$ modelsare considered in this work: one is $SU(2)_L\otimes SU(2)_2 \otimes U(1)_X \toSU(2)_L\otimes U(1)_Y$, the other is $SU(2)_1\otimes SU(2)_2 \otimes U(1)_Y \toSU(2)_L\otimes U(1)_Y$. The symmetry breaking of the $G(331)$ model is$SU(3)_L\otimes U(1)_X \to SU(2)_L \otimes U(1)_Y$. We perform a globalanalysis of $W^\prime$ and $Z^\prime$ phenomenology in ten new physics models,including all the channels of $W^\prime/Z^\prime$ decay. Our study shows thatthe leptonic mode and the dijet mode of $W^\prime/Z^\prime$ decays impose avery stringent bound on the parameter space in several new physics models. Suchtight bounds provide a useful guide for building new physics models to addresson the diboson anomalies. We also note that the Left-Right and Lepton-Phobicmodels can explain the $3.4\sigma$ $WZ$ excess if the $2.6\sigma$ deviation inthe $W^+W^-$ pair around 2~TeV were confirmed to be a fluctuation of the SMbackgrounds.

Simple non-Abelian extensions of the standard model gauge group and the diboson excesses at the LHC