CeLAND : search for a 4 th light neutrino state with a 3 PBq 144 Ce-144 Pr ν̄ e-generator in KamLAND

The reactor neutrino and gallium anomalies can be tested with a 3-4 PBq (75-100 kilocurie scale) Ce− Pr antineutrino beta-source deployed at the center or next to a large lowbackground liquid scintillator detector. The antineutrino generator will be produced by the Russian reprocessing plant PA Mayak as early as 2014, transported to Japan, and deployed in the Kamioka Liquid Scintillator Anti-Neutrino Detector (KamLAND) as early as 2015. KamLAND’s 13 m diameter target volume provides a suitable environment to measure the energy and position dependence of the detected neutrino flux. A characteristic oscillation pattern would be visible for a baseline of about 10 m or less, providing a very clean signal of neutrino disappearance into a yet-unknown, "sterile" state. This will provide a comprehensive test of the electron dissaperance neutrino anomalies and could lead to the discovery of a 4 neutrino state for ∆mnew & 0.1 eV 2 and sin(2θnew) & 0.05. 1 ar X iv :1 31 2. 08 96 v2 [ ph ys ic s. in sde t] 1 3 A pr 2 01 4 A. Gando, Y. Gando, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, H. Ishikawa, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui,D. Motoki, K. Nakamura, Y. Oki, M. Otani, I. Shimizu, J. Shirai, F. Suekane, A. Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe, B.D. Xu, S. Yamada,Y. Yamauchi, H. Yoshida Research Center for Neutrino Science, Tohoku University, Sendai 980-8578, Japan M. Cribier, M. Durero, V. Fischer, J. Gaffiot, N. Jonqueres, A. Kouchner, T. Lasserre, D. Leterme, A. Letourneau, D. Lhuillier, G. Mention, G. Rampal, L. Scola, Ch. Veyssière, M. Vivier, and P. Yala Astroparticules et Cosmologie APC, 10 rue Alice Domon et Léonie Duquet, 75205 Paris cedex 13, France Commissariat à l’énergie atomique et aux énergies alternatives, Centre de Saclay, IRFU, 91191 Gif-sur-Yvette, France Commissariat à l’énergie atomique et aux énergies alternatives, Centre de Saclay, DEN/DANS & DEN/DM2S, 91191 Gif-sur-Yvette, France 4 European Research Council Starting Grant 4th-Nu-Avenue StG-307184 Corresponding author (thierry.lasserre@cea.fr) B. E. Berger Colorado State University, Fort Collins, CO 80523-1875, USA A. Kozlov Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa 277-8583, Japan T. Banks, D. Dwyer, B. K. Fujikawa, K. Han, Yu. G. Kolomensky, Y. Mei, T. O’Donnell Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA University of California, Berkeley, CA 94704, USA Patrick Decowski Nikhef and the University of Amsterdam, Science Park 105 1098 XG, Amsterdam, the Netherlands D. M. Markoff North Carolina Central University, Durham, NC 27707, USA S. Yoshida Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan V.N. Kornoukhov, T. V.M. Gelis, G.V. Tikhomirov, I.S. Saldikov 1 Russian Federation State Scientific Center of Theoretical and Experimental Physics Institute, 117218 Moscow, Russia Scientific and Research Nuclear University, Moscow engineering and Physics Institute, Russia 3 Russian Academy of Sciences A.N. Frumkin Institute of Physical chemistry and Electrochemistry, Russia J. G. Learned, J. Maricic, S. Matsuno, R. Milincic University of Hawaii at Manoa, Honolulu, HI 96822, USA H. J. Karwowski University of North Carolina, Chapel Hill, NC 27599, USA