Opportunities for probing <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>U</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:msub><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mi>T</mml:mi><mml:mn>3</mml:mn><mml:mi>R</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> with light mediators
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
Abstract
We consider strategies for using new data sets 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 that search for displaced visible decay or invisible decay can all play a role. Still, there is a small region of parameter space which even these upcoming experiments will not be able to probe. This model can explain the observed $2.4\text{\ensuremath{-}}3\ensuremath{\sigma}$ excess of events at the COHERENT experiment in the parameter space allowed by current laboratory experiments, but the ongoing/upcoming laboratory experiments will decisively probe this possibility.