Testing Lorentz Symmetry with the Double Chooz Experiment

Understand

The Double Chooz reactor-based oscillation experiment searches for an electron antineutrino disappearance signal to investigate the neutrino mass matrix mixing angle theta 13.

• Double Chooz's reported evidence for this disappearance is generally interpreted as mass-driven mixing through this parameter.
• However, the electron antineutrino candidates collected by the experiment can also be used to search for a signature of the violation of Lorentz invariance.
• We study the sidereal time dependence of the antineutrino signal rate and probe Lorentz violation within the Standard-Model Extension (SME) framework.