Abstract
The MiniBooNE experiment at Fermilab has amassed the largest sample to date of π0s produced in neutral current (NC) neutrino-nucleus interactions at low energy. This Letter reports a measurement of the momentum distribution of π0s produced in mineral oil (CH2) and the first observation of coherent π0 production below 2 GeV. In the forward direction, the yield of events observed above the expectation for resonant production is attributed primarily to coherent production off carbon, but may also include a small contribution from diffractive production on hydrogen. Integrated over the MiniBooNE neutrino flux, the sum of the NC coherent and diffractive modes is found to be (19.5 ± 1.1 (stat) ± 2.5 (sys)) % of all exclusive NC π0 production at MiniBooNE. These measurements are of immediate utility because they quantify an important background to MiniBooNE's search for νμ → νe oscillations.
Original language | English (US) |
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Pages (from-to) | 41-46 |
Number of pages | 6 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 664 |
Issue number | 1-2 |
DOIs | |
State | Published - Jun 12 2008 |
Externally published | Yes |
Bibliographical note
Funding Information:We wish to acknowledge the support of Fermilab, the Department of Energy, and the NSF in the construction, operation, and data analysis of the MiniBooNE experiment. We also acknowledge the use of the Condor software in the analysis of the data.