An Appearance-Like Reactor Experiment To Measure Ue3

Conventional reactor neutrino experiments are dissapearance experiments, andthus have less sensitivity to small mixing angles than appearance experimentsdo. It has been recently shown that future reactor neutrino experimentsconsisiting of a near and far detector are competitive with first-generationsuperbeams in order to determine sin^2{2 theta_{13}} down to 10^{-2}. We showthat by using the antineutrino-electron elastic scattering at the near detectoraround the configuration where dsigma^{bar{\nu}_e}/dT presents a dynamicalzero, an appearance-like experiment can be simulated, with a sensitivitycomparable to the one achieved with the inverse beta-decay reaction in the fardetector. Thus, the near detector could also be used to look for oscillations.We present how antineutrino-electron elastic scattering could be properly usedfor this purpose allowing that the combination of the measurements in the fardetector and in the near detector would push the sensitivity of the experimentto a lower value of theta_{13}.Comment: 18 pp., 6 fig