Ponente
Sr.
José Mariano López
(CIEMAT)
Descripción
The purpose of Double-Chooz reactor neutrino experiment is a precision measurement of the mixing angle theta13. A crucial item of this analysis is the thorough investigation of the different backgrounds found in the detector: neutrino coincidence signals are imitated by accidental coincidences of single events and by correlated events induced by cosmic muons, including stopped muons, fast neutrons and the spallation isotopes Li-9/He-8.
This contribution presents the current state of investigations for these background sources in the Double-Chooz far detector. Several techniques designed for the identification of the corresponding events are present in it. In addition, the impact of the backgrounds on the result of the oscillation analysis is reduced by the efficient veto techniques developed. As a consequence of these efforts, the current uncertainty on the background rate has been reduced by about a factor 2 compared to earlier publications. The detailed understanding of the background sources will be crucial for a future near+far detector oscillation analysis in which the correlated background will remain as the main source of systematic uncertainty.
Autor primario
Sr.
José Mariano López
(CIEMAT)
Coautores
Sr.
Adrien Hourlier
(APC-Paris)
Sra.
Emily Conover
(University of chicago)
Sr.
Guillaume Pronost
(APC-Paris)
Sr.
Lee Fedor Stokes
(Universität Tübingen)
Sr.
Makoto Kitazawa
(Niigata University)
Sr.
Michael Wurm
(Universität Tübingen)
Sra.
Rachel Carr
(Columbia University)
Sra.
Ralitsa Sharankova
(Tokio Institute of technology)
Sr.
Romain Roncin
(APC-Paris)
