A Combined $$\nu_\mu \rightarrow \nu_e$$ and $$\bar \nu_\mu \rightarrow \bar \nu_e$$ Oscillation Analysis of the MiniBooNE Excesses
The MiniBooNE experiment at Fermilab reports results from an analysis of the combined $$\nu_e$$ and $$\bar \nu_e$$ appearance data from $$6.46 \times 10^{20}$$ protons on target in neutrino mode and $$11.27 \times 10^{20}$$ protons on target in antineutrino mode. A total excess of $$240.3 \pm 34.5 \pm 52.6$$ events ($$3.8 \sigma$$) is observed from combining the two data sets in the energy range $$200<1250$$ MeV. In a combined fit for CP-conserving $$\nu_\mu \rightarrow \nu_e$$ and $$\bar{\nu}_{\mu}\rightarrow\bar{\nu}_e$$ oscillations via a two-neutrino model, the background-only fit has a $$\chi^2$$-probability of 0.03% relative to the best oscillation fit. The data are consistent with neutrino oscillations in the $$0.01 < \Delta m^2 < 1.0$$ eV$^2$ range and with the evidence for antineutrino oscillations from the Liquid Scintillator Neutrino Detector (LSND).
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- MiniBooNE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1336409
- Report Number(s):
- LA-UR-12-23041; Fermilab-PUB-12-394-AD-PPD; FERMILAB-PUB-12-394-AD-PPD; arXiv:1207.4809; oai:inspirehep.net:1495903
- Country of Publication:
- United States
- Language:
- English
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