We study the impact of very light sterile neutrinos (Δmnew2 [1,10]×10-2eV2, sin 22θnew<10-1) on analyses of upcoming θ13-driven reactor antineutrino experiments like Double CHOOZ and Daya Bay. Oscillations driven by these values of Δmnew2 affect data in the near and far detectors differently and hence potentially modify the capability of these experimental setups to constrain and measure sin 22θ13. We find that the hypothesis θnew 0 negatively impacts one's ability to place an upper bound on sin 22θ13 in the advent of a no-oscillation signal or to measure sin 22θ13 if a θ13-driven signal is observed. The impact of sterile neutrino effects, however, depends dramatically on one's ability to measure the recoil positron energy spectrum. If sin 22θnew 10-2, upcoming θ13-driven reactor antineutrino experiments should be able to measure sin 22θnew and Δmnew2, along with sin 22θ13, as long as one is sensitive to distortions in the recoil positron energy spectrum in the near (and far) detectors.
|Original language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Apr 1 2009|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)