We reconsider the case of light vectors coupled to anomalous fermionic currents, focusing on the interplay between ultraviolet and infrared dynamics. Taking as a general framework the gauging of the Standard Model accidental symmetries, we show that it is possible to devise an anomaly-free ultraviolet completion with mostly chiral heavy fermions such that anomalous Wess-Zumino terms are suppressed in the infrared, thus relaxing would-be strong bounds from the longitudinal emission of light vectors coupled to nonconserved currents. We classify such scenarios and show that they will be extensively probed at the high-luminosity phase of the LHC via the measurement of the higgs into gamma gamma rate and the direct search for nondecoupling charged leptons.
Light vectors coupled to anomalous currents with harmless Wess-Zumino terms / Di Luzio, Luca; Nardecchia, Marco; Toni, Claudio. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 105:11(2022). [10.1103/PhysRevD.105.115042]