New constraints on bad gauge symmetries

Speaker: Jeff Dror, Berkeley/LBL

When: November 20, 2018 (Tue), 11:00AM to 12:00PM (add to my calendar)
Location: PRB 595

This event is part of the HET Seminar Series.

New light vectors with dimension-4 couplings to Standard Model states have (energy / vector mass)^2 enhanced production rates unless the current they couple to is conserved. In this talk I will discuss the consequences of gauging (almost) any such current considering vectors coupled to anomalous currents, fermionic currents, and bosonic currents. Looking for energy-enhanced processes, I will derive new constraints on the couplings of such vectors, that are significantly stronger than the previous literature for a wide variety of models. The new limits arise from a range of processes, including rare Z decays and flavor changing meson decays, and rule out a number of phenomenologically-motivated proposals.