Abstract
This is a contribution paper from the Double Chooz (DC) experiment to the special issue of Nuclear Physics B on the topics of neutrino oscillations, celebrating the recent Nobel prize to Profs. T. Kajita and A.B. McDonald.DC is a reactor neutrino experiment which measures the last neutrino mixing angle θ13. The DC group presented an indication of disappearance of the reactor neutrinos at a baseline of ∼1 km for the first time in 2011 and is improving the measurement of θ13. DC is a pioneering experiment of this research field. In accordance with the nature of this special issue, physics and history of the reactor-θ13 experiments, as well as the Double Chooz experiment and its neutrino oscillation analyses, are reviewed.
Highlights
Physics Results As already noted, the Double Chooz collaboration was the first one among the neutrino reactor experiments to present an indication of non-zero θ13 at
Many efforts and advances were performed by the collaboration to improve this result and we summarize them until the current time, defining each Double Chooz (DC) data-release as: Gd-I [29], Gd-II [40], H-II [41], Gd-III [42] and H-III [43]
To select the candidates of an inverse beta decay (IBD) in the recorded data, we look for positron and neutron capture event pairs correlated in time and space, which strongly suppress the backgrounds caused by single events
Summary
T. Kajita and A.B. McDonald are awarded the Nobel prize in physics for the discovery that neutrinos have finite mass, through neutrino oscillations. Kajita’s study was detecting atmospheric neutrino oscillations [1] and measurement of neutrino oscillation parameters, θ23 and ∆m232. The Double Chooz (DC) experiment detects another type of neutrino oscillation using reactor neutrinos at a ∼ 1 km baseline and is measuring a neutrino mixing parameter, θ13. This article is to explain the Double Chooz experiment as a part of the special issue of the Nuclear Physics B, for celebrating the Nobel prize. The physics and history of the θ13 measurement, an overview of the Double Chooz experiment and its results on the neutrino oscillation measurements so far are summarized
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