The search for inclusive electron-neutrino oscillations on the Serpukhov 70 GeV accelerator with the IHEP-JINR neutrino detector

The experiment on the search for inclusive electron neutrino oscillations is being carried out at the special neutrino beam of the Serpukhov 70 GeV accelerator using the IHEP-JINR neutrino detector. The short decay cavity of the neutrino beam makes it possible to search for oscillations analyzing the shape of the distribution of events using the variable LE, where L is the distance from the point of origin to the point of interaction of neutrino, E is the neutrino energy. The data of the two runs are processed and analysed. The best fit is obtained with Δm2 = 300 eV2 and sin2 2Θ = 0.144, but the X2 does not differ much for the hypothesis of no oscillations (within one standard deviation). This gives the limits on the oscillation parameters of sin2 2Θ < 0.115 at Δm2 = 175 eV2 (90% C.L.). For reasons outlined in the text, we believe this limit to be better or more reliable than earlier limits published by other experiments.