Updated Electron Neutrino Appearance Results from MiniBooNE
- Columbia U.
New electron neutrino appearance results are presented for the MiniBooNE experiment at Fermilab with a total data set approximately a factor of 2 larger than previously reported. The new data has a significant excess in the low energy region that is consistent with the previously published MiniBooNE low energy excess results. If interpreted in a standard two-neutrino, $$\nu_\mu\rightarrow\nu_e$$, oscillation model, the best oscillation fit to the neutrino-mode excess has a $$\chi^2$$ probability of ~15\% while the background-only fit has a probability of $$0.06\%$$ relative to the best oscillation fits. All of the major backgrounds are constrained by in-situ event measurements and so non-oscillation explanations would need to invoke new anomalous background processes or other new physics. The MiniBooNE excess is consistent with the LSND observations as a function of distance/energy ($L/E$) in the range of overlap. A 3+1 sterile oscillation interpretation for the MiniBooNE/LSND appearance data is in tension with current disappearance results and may require more complicated models and/or new physics.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- MiniBooNE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1527393
- Report Number(s):
- FERMILAB-CONF-18-775-ND; 1733452
- Journal Information:
- PoS, Vol. NOW2018; Conference: Neutrino Oscillation Workshop, Ostuni , Brindisi, Italy, 09/09-09/16/2018
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Combined $\nu_\mu \rightarrow \nu_e$ and $\bar \nu_\mu \rightarrow \bar \nu_e$ Oscillation Analysis of the MiniBooNE Excesses
Event Excess in the MiniBooNE Search for $\bar \nu_\mu \rightarrow \bar \nu_e$ Oscillations