Abstract
We propose novel collider searches which can significantly improve the LHC reach to new gauge bosons Z′ with mixed anomalies with the electroweak (EW) gauge group. Such a Z′ necessarily acquires a Chern-Simons coupling to the EW gauge bosons and these couplings can drive both exotic Z decays into Z′γ if the new gauge boson is sufficiently light, as well as Z′ decays into EW gauge bosons. While the exotic decay rate of the heavy Z into Z′γ is too small to be observed at the LHC, for a light Z′, we show the potential of a lepton jet search in association with a photon to probe the rare decay Z → Z′γ.
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Ismail, A., Katz, A. Anomalous Z′ and diboson resonances at the LHC. J. High Energ. Phys. 2018, 122 (2018). https://doi.org/10.1007/JHEP04(2018)122
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DOI: https://doi.org/10.1007/JHEP04(2018)122