Improved measurements of the neutrino mixing angle θ_13 with the Double Chooz detector

Show simple item record Double Chooz Collaboration Busenitz, J. Elnimr, M. Fernandes, S.M. Reichenbacher, J. Stancu, I. Sun, Y. 2022-08-02T15:11:25Z 2022-08-02T15:11:25Z 2014
dc.identifier.citation Abe, Y., dos Anjos, J. C., Barriere, J. C., Baussan, E., Bekman, I., Bergevin, M., Bezerra, T. J. C., Bezrukov, L., Blucher, E., Buck, C., Busenitz, J., Cabrera, A., Caden, E., Camilleri, L., Carr, R., Cerrada, M., Chang, P.-J., Chauveau, E., … Zimmer, V. (2014). Improved measurements of the neutrino mixing angle θ 13 with the Double Chooz detector. In Journal of High Energy Physics (Vol. 2014, Issue 10). Springer Science and Business Media LLC. en_US
dc.description.abstract The Double Chooz experiment presents improved measurements of the neutrino mixing angle \(\theta_{13}\) using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect to previous publications, whereas the efficiency of the \(\overline{\upsilon}_e\) signal has increased. The value of \(\theta_{13}\) is measured to be sin² 2 \(\theta_{13}\)  =  0.090 − 0.029 + 0.032 from a fit to the observed energy spectrum. Deviations from the reactor \(\overline{\upsilon}_e\) prediction observed above a prompt signal energy of 4 MeV and possible explanations are also reported. A consistent value of \(\theta_{13}\) is obtained from a fit to the observed rate as a function of the reactor power independently of the spectrum shape and background estimation, demonstrating the robustness of the \(\theta_{13}\) measurement despite the observed distortion. en_US
dc.format.mimetype application/pdf
dc.language English
dc.subject High Energy Physics - Experiment en_US
dc.subject Instrumentation and Detectors en_US
dc.subject Oscillation en_US
dc.subject Neutrino Detectors and Telescopes en_US
dc.title Improved measurements of the neutrino mixing angle θ_13 with the Double Chooz detector en_US
dc.type text

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