Anomalous $Z^{\prime }$ and Diboson Resonances at the LHC

Abstract

We propose novel collider searches which can significantly improve the LHC reach to new gauge bosons $Z^{\prime }$ with mixed anomalies with the electroweak (EW) gauge group. Such a $Z^{\prime }$ necessarily acquires a Chern-Simons coupling to the EW gauge bosons and these couplings can drive both exotic $Z$ decays into $Z^{\prime }\gamma$ if the new gauge boson is sufficiently light, as well as $Z^{\prime }$ decays into EW gauge bosons.While the exotic decay rate of the heavy $Z$ into $Z^{\prime }\gamma$ is too small to be observed at the LHC, for a light $Z^{\prime }$, we show the potential of a lepton jet search in association with a photon to probe the rare decay $Z\to Z^{\prime }\gamma$.

17 pages, 4 figures. v2: equation corrected, main results in Section 4 unchanged, accepted for publication in JHEP

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Cited by in corpus (15)

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• Top-philic $Z^{\prime }$ Forces at the LHC
• Light vectors coupled to bosonic currents
• Anomalous $Z^{\prime }$ bosons for anomalous $B$ decays
• Light vectors coupled to anomalous currents with harmless Wess-Zumino terms
• Probing new $U(1)$ gauge symmetries via exotic $Z\to Z^{\prime }\gamma$ decays
• Minimal anomalous $\mathrm{U}(1)$ theories and collider phenomenology
• Dijet and electroweak limits on a $Z^{\prime }$ boson coupled to quarks
• The dark side of the proton
• The Elusive Muonic WIMP
• Probing triple-gauge couplings in anomalous gauge theories at hadron and lepton colliders
• A framework for missing-energy searches with anomalous light vectors