We perform a detailed combined fit to the $\overline \nu_e \rightarrow \overline \nu_e$ disappearence data of the Daya Bay experiment and the appearance $\nu_{ \mu} \rightarrow \nu_{ e}$ and disappearance $\nu_{ \mu} \rightarrow \nu_{ \mu}$ data of the Tokai to Kamioka (T2K) one in the presence of two models of new physics affecting neutrino oscillations, namely a model where sterile neutrinos can propagate in a large compactified extra dimension and a model where non-standard interactions (NSI) affect the neutrino production and detection. We find that the Daya Bay $\oplus$ T2K data combination constrains the largest radius of the compactified extra dimensions to be $R\lesssim 0.17$ $\mu { \rm m}$ at 2$\sigma$ C.L. (for the inverted ordering of the neutrino mass spectrum) and the relevant NSI parameters in the range ${ \mathcal O}(10^{ -3})-{ \mathcal O}(10^{ -2})$, for particular choices of the charged parity violating phases.
Categories: hep-ph