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

作者：Abe Y^*; Aberle C; dos Anjos J C; Barriere J C; Bergevin M; Bernstein A; Bezerra T J C; Bezrukhov L; Blucher E; Bowden N S; Buck C; Busenitz J; Cabrera A; Caden E; Camilleri L; Carr R; Cerrada M; Chang P J; Chimenti P; Classen T; Collin A P; Conover E; Conrad J M; Crespo Anadon J I; Crum K; Cucoanes A; D' Agostino M V; Damon E; Dawson J V; Dazeley S; Dietrich D; Djurcic Z; Dracos M; Durand V; Ebert J

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(1): 011102.

DOI：10.1103/PhysRevD.87.011102

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

• 出版日期2013-1-8
• 单位中国地震局; 美国弗吉尼亚理工大学(Virginia Tech)