Latest oscillation results from Daya Bay

Bei-Zhen Hu^1*, Yee Bob Hsiung¹

¹Department of Physics, National Taiwan University, Taipei, Taiwan

* Presenter:Bei-Zhen Hu, email:ptbei1985@gmail.com

The mixing matrix of neutrino oscillation was not completed until 2012, when Daya Bay Reactor Neutrino Experiment discovered a non-zero value for the neutrino mixing angle θ_13. The Daya Bay experiment consists of eight functionally identical detectors placed underground at different baselines from six 2.9 GW reactor cores. After a total of about nine years of operation, it acquired world’s largest sample of reactor antineutrinos to date, 5.6 million inverse beta decay (IBD) candidates with neutron captured on gadolinium obtained from the full data set, and the world’s most precise determination of sin² 2θ₁₃ with more than 5σ significance. It is crucial to have a precise measurement on θ₁₃! The result of θ₁₃ measurement tells us that it is possible to determine the neutrino mass ordering by using reactor antineutrinos and to measure CP phase.

Keywords: Neutrino Oscillation, mixing angle, neutrino physics