Summary: The Double Chooz experiment measures precisely the anti-electron-neutrino flux from Chooz reactor cores in Ardennes, using two large liquid-scintillator detectors located at distances of about 400m and 1000m. From this measurement, the value of the third neutrino-oscillation angle, theta_13, can be determined. It is one of the most important parameters in the neutrino research in the current decade.

French member :
A. Cabrera, J. Dawson, M. Fallot, D. Franco, V. Fisher, H. de Kerret, T. Lasserre, G. Mention, M.Pequignot, A. Tonazzo, M. Vivier

Japanese member :
M. Kuze, T. Hara, M. Ishitsuka, T. Kawasaki, F. Suekane, T. Sumiyoshi

References:
Y. Abe et al. (Double Chooz collraboration), arXiv:1406.7763 (submitted to JHEP).
Y. Abe et al. (Double Chooz collraboration), Phys. Lett. B735 (2014) 51-56.
Y. Abe et al. (Double Chooz collraboration), Phys. Lett. B723 (2013) 66-70.
Y. Abe et al. (Double Chooz collraboration), Phys. Rev. D 86 (2012) 052008.
Y. Abe et al. (Double Chooz collraboration), Phys. Rev. Lett. 108 (2012) 131801.

website:
http://doublechooz.in2p3.fr/
http://dchooz.titech.jp.hep.net/