Oscillation results from T2K

Abstract

The T2K collaboration has combined the $\nu_{\mu}$ disappearance and $\nu_e $appearance data in a three-flavor neutrino oscillation analysis. A Markov chain Monte Carlo results in estimates of the oscillation parameters and 1D 68% Bayesian credible intervals at $\delta_{CP} = 0$ as follows: $\sin^{2}\theta_{23} = 0.520^{+0.045}_{-0.050}$, $\sin^{2}\theta_{13} = 0.0454^{+ 0.011}_{-0.014}$ and $|\Delta m^{2}_{32}| = 2.57\pm0.11$, with the point of highest posterior probability in the inverted hierarchy. Recent measurements of $\theta_{13}$ from reactor neutrino experiments are combined with the T2K data resulting in the following estimates: $\sin^{2}\theta_{23} = 0.528^{+0.055}_{-0.038}$, $\sin^{2}\theta_{13} = 0.0250 \pm 0.0026$ and $|\Delta m^{2}_{32}| = 2.51\pm0.11$, with the point of highest posterior probability in the normal hierarchy. Furthermore, the data exclude values of $\delta_{CP}$ between 0.14$\pi$-0.87$\pi$ with 90% probability.