Diboson excess and $Z^{\prime }$-predictions via left-right non-linear Higgs

Abstract

The excess events reported by the ATLAS Collaboration in the $WZ$-final state, and by the CMS Collaboration in the $e^{+}{e}^{-}jj$, $Wh$ and $jj$-final states, may be induced by the decays of a heavy boson $W^{\prime }$ in the 1.8-2 TeV mass range, here modelled via the larger local group $SU(2{)}_L\times SU(2{)}_R\times U(1{)}_{B-L}$ in a non-linear dynamical Higgs scenario. The $W^{\prime }$-production cross section at the 13 TeV LHC is around 700-1200 fb. This framework also predicts a heavy $Z^{\prime }$ boson with a mass of 2.5-4 TeV, and some decay channels testable in the LHC Run II. We determine the cross section times branching fractions for the dijet, dilepton and top-pair $Z^{\prime }$-decay channels at the 13 TeV LHC around 2.3, 7.1, 70.2 fb respectively, for $M_{Z^{\prime }}=2.5$ TeV, while one/two orders of magnitude smaller for the dijet/dilepton and top-pair modes at $M_{Z^{\prime }}=4$ TeV. Non-zero contributions from the effective operators, and the underlying Higgs sector of the model, will induce sizeable enhancement in the $W^{+}{W}^{-}$ and $Zh$-final states that could be probed in the future LHC Run II.

11 pages, 6 figures

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Cited by in corpus (3)

• Top partner-resonance interplay in a composite Higgs framework
• Understanding diboson anomalies
• Modelling top partner-vector resonance phenomenology