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The Double Chooz reactor neutrino experiment  [PDF]
I. Gil-Botella
Physics , 2007, DOI: 10.1088/1742-6596/110/8/082007
Abstract: The Double Chooz reactor neutrino experiment will be the next detector to search for a non vanishing theta13 mixing angle with unprecedented sensitivity, which might open the way to unveiling CP violation in the leptonic sector. The measurement of this angle will be based in a precise comparison of the antineutrino spectrum at two identical detectors located at different distances from the Chooz nuclear reactor cores in France. Double Chooz is particularly attractive because of its capability to measure sin2(2theta13) to 3 sigmas if sin2(2theta13) > 0.05 or to exclude sin2(2theta13) down to 0.03 at 90% C.L. for Dm2 = 2.5 x 10-3 eV2 in three years of data taking with both detectors. The construction of the far detector starts in 2008 and the first neutrino results are expected in 2009. The current status of the experiment, its physics potential and design and expected performance of the detector are reviewed.
A High Precision Reactor Neutrino Detector for the Double Chooz Experiment  [PDF]
Fumihiko Suekane,for the Double Chooz Collaboration
Physics , 2009, DOI: 10.1016/j.nima.2010.03.029
Abstract: Double Chooz is a reactor neutrino experiment which investigates the last neutrino mixing angle; theta-13. It is necessary to measure reactor neutrino disappearance with precision 1% or better to detect finite value of theta-13. This requirement is the most strict compared to other reactor neutrino experiments performed so far. The Double Chooz experiment makes use of a number of techniques to reduce the possible errors to achieve the sensitivity. The detector is now under construction and it is expected to take first neutrino data in 2009 and to measure sin^22theta-13 with a sensitivity of 0.03 (90%C.L.) In this proceedings, the technical concepts of Double Chooz detector are explained stressing on how it copes with the systematic errors.
Latest News from Double Chooz Reactor Neutrino Experiment  [PDF]
Masahiro Kuze,for Double Chooz Collaboration
Physics , 2011, DOI: 10.1063/1.3700585
Abstract: Double Chooz experiment will search for a disappearance of the reactor neutrinos from Chooz reactor cores in Ardenne, France, in order to detect the yet unknown neutrino oscillation angle \theta 13. The far detector was completed in 2010 and data-taking has started in spring 2011. Status of data-taking is presented and some performance plots from physics data are shown in this paper for the first time. Also the prospect of experimental sensitivity is presented, in light of recent indication from T2K for a non-zero \theta 13 value.
First result from the Double Chooz reactor-neutrino experiment  [PDF]
Tsunayuki Matsubara,on behalf of the Double Chooz collaboration
Statistics , 2012,
Abstract: We report first results of a search for the non-zero neutrino mixing angle \theta_{13} from the Double Chooz experiment. Double Chooz aims to measure the mixing angle based on anti-electron-neutrino disappearance as a consequence of neutrino oscillation. A new generation of anti-electron-neutrino detector having 10 m^3 fiducial volume is located 1 km from the two 4.25 GW_{th} reactors at the Chooz Power Plant in France. Physics data taking has been continuing since April 2011. A ratio of observed-to-predicted event rate of 0.944 +/- 0.016 (stat) +/- 0.040 (syst) was obtained in 101 days of detector running. Analyzing both the rate and their energy spectral shape, we found sin^{2}2\theta_{13} = 0.086 +/- 0.041 (stat) +/- 0.030 (syst) at \Delta m^2_{atm} = 2.4 x 10^{-3} eV^2.
The Double Chooz Experiment  [PDF]
Charles E. Lane
Physics , 2008,
Abstract: The Double Chooz experiment returns to the site of the Chooz experiment with a pair of detectors for a differential neutrino flux measurement, providing sensitivity to sin^2(2theta13) > 0.03. Reaching this goal requires significant improvements in systematic uncertainties, based on the experience with previous reactor neutrino experiments.
The Double Chooz Experiment  [PDF]
Daniel M. Kaplan
Physics , 2006, DOI: 10.1063/1.2402699
Abstract: There is broad consensus in the worldwide physics community as to the need for a new reactor-neutrino experiment to measure or limit the neutrino mixing angle $\theta_{13}$. The Double Chooz Experiment, planned for operation in the years 2008-2011, will search for values of $\sin^2{2\theta_{13}}$ down to $\approx$0.03. This will be the first new information on $\theta_{13}$ in over a decade and will cover most of the remaining parameter space. A quick and relatively inexpensive project is made possible by the existing neutrino laboratory at the Chooz site.
Characterization of large area photomutipliers under low magnetic fields: design and performances of the magnetic shielding for the Double Chooz neutrino experiment  [PDF]
E. Calvo,M. Cerrada,C. Fernández-Bedoya,I. Gil-Botella,C. Palomares,I. Rodríguez,F. Toral,A. Verdugo
Physics , 2009, DOI: 10.1016/j.nima.2010.06.009
Abstract: This paper describes the characterization studies under low magnetic fields of the Hamamatsu R7081 photomultipliers that are being used in the Double Chooz experiment. The design and performances of the magnetic shielding that has been developed for these photomultipliers are also reported.
Studying Neutrino Directionality with Double Chooz  [PDF]
Erica Caden,for the Double Chooz collaboration
Physics , 2012,
Abstract: The first results from Double Chooz with 100 days of data measured $\sin^2(2\theta_{13}) = 0.086 \pm 0.051$. Backgrounds contribute significantly to the systematic uncertainty budget. Using the incoming neutrino directionality we will attempt to further separate the inverse beta decay signal from backgrounds. The CHOOZ experiment completed a similar analysis and found that the neutrino source can be located to within a cone of half-aperture of 18 degrees at the 68% C.L. We study the possible improvement of this result by Double Chooz.
From Double Chooz to Triple Chooz - Neutrino Physics at the Chooz Reactor Complex  [PDF]
P. Huber,J. Kopp,M. Lindner,M. Rolinec,W. Winter
Physics , 2006, DOI: 10.1088/1126-6708/2006/05/072
Abstract: We discuss the potential of the proposed Double Chooz reactor experiment to measure the neutrino mixing angle $\sin^2 2\theta_{13}$. We especially consider systematical uncertainties and their partial cancellation in a near and far detector operation, and we discuss implications of a delayed near detector startup. Furthermore, we introduce Triple Chooz, which is a possible upgrade scenario assuming a second, larger far detector, which could start data taking in an existing cavern five years after the first far detector. We review the role of the Chooz reactor experiments in the global context of future neutrino beam experiments. We find that both Double Chooz and Triple Chooz can play a leading role in the search for a finite value of $\sin^2 2\theta_{13}$. Double Chooz could achieve a sensitivity limit of $\sim 2 \cdot 10^{-2}$ at the 90%~confidence level after 5~years while the Triple Chooz setup could give a sensitivity below $10^{-2}$.
The Status of Double Chooz Experiment as a proceeding of PIC 2013 conference  [PDF]
Guang Yang
Physics , 2014,
Abstract: Double Chooz is a long baseline neutrino oscillation experiment at Chooz, France. The purpose of this experiment is to measure the non-zero neutrino oscillation parameter theta13, a parameter for changing electron neutrinos into other neutrinos. This experiment uses reactors of the Chooz Nuclear Power Plant as a neutrino source. Double Chooz has published 2 result papers showing the measurement of the mixing angle, and 3rd publication is processing.
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