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: ${\sin }^2{\theta }_{23}=0.520_{-0.050}^{+0.045}$, ${\sin }^2{\theta }_{13}=0.0454_{-0.014}^{+0.011}$ and $|\Delta m_{32}^2|=2.57\pm 0.11$, 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: ${\sin }^2{\theta }_{23}=0.528_{-0.038}^{+0.055}$, ${\sin }^2{\theta }_{13}=0.0250\pm 0.0026$ and $|\Delta m_{32}^2|=2.51\pm 0.11$, 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.

Comments: Rencontres de Moriond Electroweak Interactions and Unified Theories Conference 2014