R2D2 - a symmetric measurement of reactor neutrinos free of systematical errors

Abstract

We discuss a symmetric setup for a reactor neutrino oscillation experiment consisting of two reactors separated by about 1 km, and two symmetrically placed detectors, one close to each reactor. We show that such a configuration allows a determination of sin 2 2θ 13 which is essentially free of systematical errors, if it is possible to separate the contributions of the two reactors in each detector sufficiently. This can be achieved either by considering data when in an alternating way only one reactor is running or by directional sensitivity obtained from the neutron displacement in the detector.

Testing mass-varying neutrinos with reactor experiments

“…As one may expect, in the (poor) statistics dominated regime 1/ √ N ≫ σ uc , the error scales as 1/ √ N , whereas for large event numbers 1/ √ N ≪ σ uc the error is limited by the systematical uncertainty σ uc (cf., also Refs. [38][39][40] for similar considerations).…”

Electron-Beam Domain Writing in Stoichiometric LiTaO3 Single Crystal by Utilizing Resist Layer

“…Otherwise, the detector should be desired to be able to distinguish the events induced by the first reactor binary-core from the other. In the paper [20,21], a good determination of the anti-neutrino incoming direction is discussed. It is based on the neutron boost in the forward direction via the inverse beta-decay reaction, which is induced by the incident neutrino; the kinetic energy of the neutron remains even after collisions with protons inside the detector.…”

Neutrino Oscillations in Deconstructed Dimensions

“…Our model could be tested at short baselines by (future) ν e (or ν e ) disappearance experiments with sensitivities for mixing angles 0.2 between the active and the KK-neutrinos. Here, it could prove useful to employ also two-reactor-two-detector-setups [56], where one may perform measurements practically free from the typical systematic uncertainties in the reactor neutrino fluxes. More generally, one can consider any experiment, which probes the effect of sterile neutrinos, provided that one can identify the masses and mixings properly.…”