A Combined $\nu_\mu \to \nu_e$ and $\bar\nu_\mu \to \bar\nu_e$ Oscillation Analysis of the MiniBooNE Excesses

MiniBooNE Collaboration; A. A. Aguilar-Arevalo; B. C. Brown; L. Bugel; G. Cheng; E. D. Church; J. M. Conrad; R. Dharmapalan; Z. Djurcic; D. A. Finley; R. Ford; F. G. Garcia; G. T. Garvey; J. Grange; W. Huelsnitz; C. Ignarra; R. Imlay; R. A. Johnson; G. Karagiorgi; T. Katori; T. Kobilarcik; W. C. Louis; C. Mariani; W. Marsh; G. B. Mills; J. Mirabal; C. D. Moore; J. Mousseau; P. Nienaber; B. Osmanov; Z. Pavlovic; D. Perevalov; C. C. Polly; H. Ray; B. P. Roe; A. D. Russell; M. H. Shaevitz; J. Spitz; I. Stancu; R. Tayloe; R. G. Van de Water; D. H. White; D. A. Wickremasinghe; G. P. Zeller; E. D. Zimmerman

arXiv · 1207.4809

A Combined $\nu_\mu \to \nu_e$ and $\bar\nu_\mu \to \bar\nu_e$ Oscillation Analysis of the MiniBooNE Excesses

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Abstract

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 $200<E_\nu^{QE}<1250$ 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).

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MiniBooNE Collaboration, A. A. Aguilar-Arevalo, B. C. Brown, L. Bugel, G. Cheng, E. D. Church, J. M. Conrad, R. Dharmapalan, Z. Djurcic, D. A. Finley, R. Ford, F. G. Garcia, G. T. Garvey, J. Grange, W. Huelsnitz, C. Ignarra, R. Imlay, R. A. Johnson, G. Karagiorgi, T. Katori, T. Kobilarcik, W. C. Louis, C. Mariani, W. Marsh, G. B. Mills, J. Mirabal, C. D. Moore, J. Mousseau, P. Nienaber, B. Osmanov, Z. Pavlovic, D. Perevalov, C. C. Polly, H. Ray, B. P. Roe, A. D. Russell, M. H. Shaevitz, J. Spitz, I. Stancu, R. Tayloe, R. G. Van de Water, D. H. White, D. A. Wickremasinghe, G. P. Zeller, E. D. Zimmerman. 2012-07-19. A Combined $\nu_\mu \to \nu_e$ and $\bar\nu_\mu \to \bar\nu_e$ Oscillation Analysis of the MiniBooNE Excesses. https://arxiv.org/abs/1207.4809

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