26-30 July 2021
Zoom
Europe/Berlin timezone

Sterile Neutrino Search from Daya Bay

Not scheduled
20m
Zoom

Zoom

Poster Neutrino Physics T04: Neutrino Physics

Speaker

Olivia Dalager (University of California, Irvine)

Description

Along with other experiments, the Daya Bay Reactor Neutrino Experiment has searched for light sterile neutrino mixing, using electron antineutrino disappearance. Through comparing a 1230-day sample to prediction, assuming a 3+1 neutrino model, Daya Bay set the most stringent limits to date on the mixing of sterile neutrinos for $2\times 10^{-4}\, < \Delta m^2_{41} < 0.3$ eV$^2$. A joint analysis with the Bugey-3 short-baseline reactor experiment and MINOS/MINOS+ accelerator experiments resulted in the world-leading limits on the $\theta_{\mu e}$ mixing angle for over five orders of magnitude in the sterile mass-squared difference $\Delta m^2_{41}$. These results exclude the LSND and MiniBooNE allowed regions at $90\%$ for $\Delta m^2_{41} < 5$ eV$^2$, weakening the sterile neutrino explanation of their observations. The Daya Bay results, as well as the combined results, will be presented in this poster.

Collaboration / Activity Daya Bay collaboration

Primary author

Olivia Dalager (University of California, Irvine)

Presentation Materials