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Direct measurement of backgrounds using reactor-off data in Double Chooz
Journal article   Open access

Direct measurement of backgrounds using reactor-off data in Double Chooz

Y. Abe, C. Aberle, J. C. dos Anjos, J. C. Barriere, M. Bergevin, A. Bernstein, T. J. C. Bezerra, L. Bezrukhov, E. Blucher, N. S. Bowden, …
Physical review. D, Particles, fields, gravitation, and cosmology, v 87(1), p011102(R)
08 Jan 2013
url
https://doi.org/10.1103/physrevd.87.011102View
Accepted (AM)Open Access (Publisher-Specific) Open

Abstract

Astronomy & Astrophysics Physical Sciences Physics Physics, Particles & Fields Science & Technology
Double Chooz is unique among modern reactor-based neutrino experiments studying (nu) over bar (e) 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 beta-n-emitting isotopes, fast neutrons from cosmic muons, and stopped-mu 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. DOI: 10.1103/PhysRevD.87.011102

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Astronomy & Astrophysics
Physics, Particles & Fields
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