Nonmaximal neutrino mixing at NO$\hat{I}½$A from nonstandard interactions

Abstract

Muon neutrino disappearance measurements at NO$\hat{I}½$A suggest that maximal $\hat{I}{¸}_{23}$ is excluded at the 2.6$\ddot{I}ƒ$ CL. This is in mild tension with T2K data which prefer maximal mixing. Considering that NO$\hat{I}½$A has a much longer baseline than T2K, we point out that the apparent departure from maximal mixing in NO$\hat{I}½$A may be a consequence of nonstandard neutrino propagation in matter.

4 pages, 2 figures. Version to appear in PLB