Abstract
Double Chooz is unique among modern reactor-based neutrino experiments studying ν̄e disappearance in that data can be collected with all reactors off. In this paper, we present data from 7.53 days of reactor-off running. Applying the same selection criteria as used in the Double Chooz reactor-on oscillation analysis, a measured background rate of 1.0±0.4 events/day is obtained. The background model for accidentals, cosmogenic β-n-emitting isotopes, fast neutrons from cosmic muons, and stopped-μ decays used in the oscillation analysis is demonstrated to be correct within the uncertainties. Kinematic distributions of the events, which are dominantly cosmic-ray-produced correlated-background events, are provided. The background rates are scaled to the shielding depths of two other reactor-based oscillation experiments, Daya Bay and RENO.
| Original language | English |
|---|---|
| Article number | 011102 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 87 |
| Issue number | 1 |
| DOIs | |
| State | Published - 8 Jan 2013 |
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