Limits on neutrino oscillations from the CHOOZ experiment
- Apollonio, M.
- Baldini, A.
- Bemporad, C.
- Caffau, E.
- Cei, F.
- Déclais, Y.
- De Kerret, H.
- Dieterle, B.
- Etenko, A.
- George, J.
- Giannini, G.
- Grassi, M.
- Kozlov, Y.
- Kropp, W.
- Kryn, D.
- Laiman, M.
- Lane, C-E.
- Lefievre, B.
- Machulin, I.
- Martemyanov, A.
- Martemyanov, V.
- Mikaelian, L.
- Nicolo, D.
- Obolensky, M.
- Pazzi, R.
- Pieri, G.
- Price, L.
- Riley, S.
- Reeder, R.
- Sabelnikov, A.
- Santin, G.
- Skorokhvatov, M.
- Sobel, H.
- Steele, J.
- Steinberg, R.
- Sukhotin, S.
- Tomshaw, S.
- Veron, D.
- Vyrodov, V.
DOIAbstract
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
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