Abstract
The ATLAS collaboration reported excesses at around 2 TeV in the diboson production decaying into hadronic final states. We consider the possibility of explaining the excesses with extra gauge bosons in two simple non-Abelian extensions of the standard model. One is the so-called models with a symmetry structure of and the other is the models with an extended symmetry of . The and bosons emerge after the electroweak symmetry is spontaneously broken. Two patterns of symmetry breaking in the models are considered in this work: one is , the other is . The symmetry breaking of the model is . We perform a global analysis of and phenomenology in ten new physics models, including all the channels of decay. Our study shows that the leptonic mode and the dijet mode of decays impose a very stringent bound on the parameter space in several new physics models. Such tight bounds provide a useful guide for building new physics models to address on the diboson anomalies. We also note that the left-right and leptophobic models can explain the excess if the deviation in the pair around 2 TeV were confirmed to be a fluctuation of the SM backgrounds.
20 More- Received 25 July 2015
DOI:https://doi.org/10.1103/PhysRevD.92.095025
© 2015 American Physical Society