Minimal anomalous $\mathrm{U}(1)$ theories and collider phenomenology

Abstract

We study the collider phenomenology of a neutral gauge boson $Z^{\prime }$ arising in minimal but anomalous $\mathrm{U}(1)$ extensions of the Standard Model (SM). To retain gauge invariance of physical observables, we consider cancellation of gauge anomalies through the Green-Schwarz mechanism. We categorize a wide class of $\mathrm{U}(1)$ extensions in terms of the new $\mathrm{U}(1)$ charges of the left-handed quarks and leptons and the Higgs doublet. We derive constraints on some benchmark models using electroweak precision constraints and the latest 13 TeV LHC dilepton and dijet resonance search data. We calculate the decay rates of the exotic and rare one-loop $Z^{\prime }$ decays to $ZZ$ and $Z$-photon modes, which are the unique signatures of our framework. If observed, these decays could hint at anomaly cancellation through the Green-Schwarz mechanism. We also discuss the possible observation of such signatures at the LHC and at future ILC colliders.

29 pages, 6 figures, 3 tables

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Cited by in corpus (11)

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• Classification of anomaly-free 2HDMs with a gauged U(1)' symmetry
• Effective Field Theory of Stückelberg Vector Bosons
• Neutrino and $Z^{\prime }$ phenomenology in an anomaly-free $\mathbf{U}(1)$ extension: role of higher-dimensional operators
• Singleton Portals to the Twin Sector
• Search for the $Z^{\prime }$ boson decaying to a right-handed neutrino pair in leptophobic $\mathrm{U}(1)$ models
• Pinning down the leptophobic $Z^{\prime }$ in leptonic final states with Deep Learning
• Anomalous $U(1)$ extension of the Standard Model
• Probing Leptophobic Dark Sectors via Gravitational Wave Signatures
• Leptogenesis in an anomaly-free $\mathrm{U}(1)$ extension with higher-dimensional operators