T-2, Nuclear and Particle Physics, Astrophysics and Cosmology

Searches for Nu Interactions: In the Sun, at Colliders, and Across Long Baselines

Ian Shoemaker

Solar neutrinos have led to the discovery of nonzero neutrino masses. However, the observed absence of the predicted MSW "upturn" may again be pointing towards new BSM physics, this time in the form of non-standard neutrino interactions (NSI). Along with future solar data, these neutrino interactions can be probed directly at high-energy colliders and long-baseline oscillation experiments. We show that the use of missing energy events with a single jet yield some of the most stringent limits to date on NSI, but do not constrain it to the level indicated by solar data. On the other hand, upcoming long-baseline experiments such as NOvA and LBNE can see large departures from SM-only physics. At the same time however, nonzero NSI introduces fundamental degeneracies that will complicate a measurement of CP violation and the mass hierarchy at NOvA. Lastly, I will discuss ongoing work on models of NSI with light mediators that can be constrained via low-energy and astrophysical probes.


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