Two methods are employed to measure the neutrino flux of the antineutrino-mode beam observed by the MiniBooNE detector. The first method compares data to simulated event rates in a high-purity νμ- induced charged-current single π+ (CC1π+) sample while the second exploits the difference between the angular distributions of muons created in νμ and ν̄μ charged-current quasielastic (CCQE) interactions. The results from both analyses indicate the prediction of the neutrino flux component of the predominately antineutrino beam is overestimated-the CC1π+ analysis indicates the predicted νμ flux should be scaled by 0.76±0.11, while the CCQE angular fit yields 0.65±0.23. The energy spectrum of the flux prediction is checked by repeating the analyses in bins of reconstructed neutrino energy, and the results show that the spectral shape is well-modeled. These analyses are a demonstration of techniques for measuring the neutrino contamination of antineutrino beams observed by future nonmagnetized detectors. © 2011 American Physical Society.
Publication Source (Journal or Book title)
Physical Review D - Particles, Fields, Gravitation and Cosmology
Aguilar-Arevalo, A., Anderson, C., Brice, S., Brown, B., Bugel, L., Conrad, J., Dharmapalan, R., Djurcic, Z., Fleming, B., Ford, R., Garcia, F., Garvey, G., Grange, J., Green, J., Imlay, R., Johnson, R., Karagiorgi, G., Katori, T., Kobilarcik, T., Linden, S., Louis, W., Mahn, K., Marsh, W., Mauger, C., Metcalf, W., Mills, G., Mirabal, J., Moore, C., Mousseau, J., Nelson, R., Nguyen, V., Nienaber, P., & Nowak, J. (2011). Measurement of the neutrino component of an antineutrino beam observed by a nonmagnetized detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 84 (7) https://doi.org/10.1103/PhysRevD.84.072005