1. Limits on neutrino oscillations from the CHOOZ experiment
- Author
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M. Apollonio, M. Laiman, L. E. Price, B. Lefievre, Giovanni Santin, V. N. Vyrodov, J. Steele, M. D. Skorokhvatov, D. Kryn, R. Pazzi, A. A. Sabelnikov, Y. Kozlov, S. Riley, A. V. Martemyanov, H. W. Sobel, M. Obolensky, Donato Nicolo, G. Pieri, S. Tomshaw, G. Giannini, A. Baldini, B. D. Dieterle, H. de Kerret, S. V. Sukhotin, Fabrizio Cei, W. R. Kropp, D. Veron, Y. Declais, I. N. Machulin, C. Bemporad, R. Reeder, L. A. Mikaelyan, L. Foresti, M. Grassi, R. Steinberg, A.V. Etenko, C. E. Lane, J. George, V. P. Martemyanov, E. Caffau, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CHOOZ, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Physics ,Normalization (statistics) ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,Detector ,FOS: Physical sciences ,Flux ,CHOOZ ,01 natural sciences ,7. Clean energy ,Spectral line ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Positron ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,Sensitivity (control systems) ,010306 general physics ,Neutrino oscillation - Abstract
We present new results based on the entire CHOOZ data sample. We find (at 90% confidence level) no evidence for neutrino oscillations in the anti_nue disappearance mode, for the parameter region given by approximately Delta m**2 > 7 x 10**-4 eV^2 for maximum mixing, and sin**2(2 theta) = 0.10 for large Delta m**2. Lower sensitivity results, based only on the comparison of the positron spectra from the two different-distance nuclear reactors, are also presented; these are independent of the absolute normalization of the anti_nue flux, the cross section, the number of target protons and the detector efficiencies., 19 pages, 11 figures, Latex file
- Published
- 1999