Opportunities for probing $U(1)_{T3R}$ with light mediators

Understand

We consider strategies for using new datasets to probe scenarios in which light right-handed SM fermions couple to a new gauge group, $U(1)_{T3R}$.

• This scenario provides a natural explanation for the light flavor sector scale, and a motivation for sub-GeV dark matter.
• There is parameter space which is currently allowed, but we find that much of it can be probed with future experiments.
• In particular, cosmological and astrophysical observations, neutrino experiments and experiments which search for displaced visible decay or invisible decay can all play a role.