VSBL Electron Neutrino Disappearance
نویسندگان
چکیده
We consider possible indications of Very-Short-BaseLine (VSBL) electron neutrino disappearance into sterile neutrinos in MiniBooNE neutrino data and Gallium radioactive source experiments. We discuss the compatibility of such a disappearance with reactor and MiniBooNE antineutrino data. We find a tension between neutrino and antineutrino data which could be due to: 1) statistical fluctuations; 2) underestimate of systematic uncertainties; 3) exclusion of our hypothesis of VSBL νe disappearance; 4) a violation of CPT symmetry. Considering the first possibility, we present the results of a combined fit of all data, which indicate that Pνe→νe < 1 with 97.04% CL. We consider also the possibility of CPT violation, which leads to the best-fit value A ee = −0.165 for the asymmetry of the νe and ν̄e survival probabilities and ACPT ee < 0 at 99.71% CL.
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