Searches for mass-3 component in the electron neutrino flavor state $\sin{ \theta}_{ 13}$ and for sterile neutrinos can be carried out in the same small mixing angle antineutrino oscillation experiment at a reactor. As an example we consider a layout, which involves several movable antineutrino spectrometers, stationed at distances 1700 m $-$ 50 m from a reactor. The experiment can scan neutrino mass parameter interval $\sim$(0.5$-$0.001) eV$^{ 2}$ and have there typical sensitivity to $\sin^{ 2}2{ \theta}$ at a level of 0.015$-$0.02. The signature for sterile neutrino is disappearance observed at mass parameter ${ \Delta}m^{ 2}_{ new}$ different from ${ \Delta}m^{ 2}_{ atm} \approx 2\times 10^{ -3}$ eV$^{ 2}$. In any case existing constraints both on $\sin{ \theta}_{ 13}$ and on sterile neutrinos can considerably be improved.
Categories: hep-ph