First Double-Chooz Results and the Reactor Antineutrino Anomaly

Original · EN

We investigate the possible effects of short-baseline antinuₑ disappearance implied by the reactor antineutrino anomaly on the Double-Chooz determination of theta₁₃ through the normalization of the initial antineutrino flux with the Bugey-4 measurement. We show that the effects are negligible and the value of theta₁₃ obtained by the Double-Chooz collaboration is accurate only if Delta m²₄₁ is larger than about 3 eV². For smaller values of Delta m²₄₁ the short-baseline oscillations are not fully averaged at Bugey-4 and the uncertainties due to the reactor antineutrino anomaly can be of the same order of magnitude of the intrinsic Double-Chooz uncertainties.