Search for neutrino oscillations at 15, 40 and 95 meters from a nuclear power reactor at Bugey

Neutrino mixing from neutrino oscillation data

“…In Fig.1 the shadowed region in the A e;µ -∆m 2 plane is the region allowed by the results of the LSND experiment. The regions excluded by the Bugey experiment [15] and by the BNL E734, BNL E776 and CCFR experiments [17] are also shown. The upper bound (2.11) is presented by the curve passing through the circles.…”

“…We have obtained the values of a 0 e and a 0 µ from the exclusion plots of the Bugey reactor experiment [15] and the CDHS and CCFR accelerator experiments [16] (see Fig.1 of [7]). In the range (2.7) we have a 0 e 4 × 10 −2 and a 0 µ 2 × 10 −1 (for ∆m 2 0.3 eV 2 ).…”

Four-neutrino mixing and Big-Bang Nucleosynthesis

“…From the 90% CL exclusion curves of the Bugey [35]ν e →ν e reactor experiment and of the CDHS [36] and CCFR [37] ν µ → ν µ accelerator experiments it follows that a 0 e is small (a 0 e 4 × 10 −2 ) for ∆m 2 SBL in the range (2.5) and a 0 µ 10 −1 for ∆m 2 SBL 0.5 eV 2 (see Fig. 1 of Ref.…”

“…In Fig.2 we have plotted the values of 2a 0 µ − a 0 e obtained from the 90% CL exclusion curves of the Bugey [35], CDHS [36] and CCFR [37] experiments. One can see that for the values of ∆m 2 SBL in which a 0 e < 2a 0 µ , if the inequality (4.8) is satisfied c s must be large and incompatible with the BBN upper bound.…”

“…The numerical values of this upper bound in the range (2.5) of ∆m 2 SBL obtained from the 90% CL exclusion curve of the Bugey [35] experiment is shown in Fig.3 (solid curve), together with the most recent exclusion curve presented by the CHORUS collaboration [52] (dash-dotted curve), the expected final sensitivity of the CHORUS [49] and NOMAD [50] experiments (dash-dot-dotted curve) and the expected sensitivity of the COSMOS [51] experiment (dotted curve).…”