Can standard model and experimental uncertainties resolve the MiniBooNE anomaly?
Abstract
We closely examine a number of theoretical uncertainties affecting the MiniBooNE short-baseline neutrino oscillation experiment in an attempt to better understand the observed excess of electronlike events. We reexamine the impact of fake charged current quasielastic events, the background due to neutral current production, and the single-photon background. For all processes, we compare the predictions of different event generators (genie, gibuu, nuance, and nuwro) and, for genie, of different tunes. Where MiniBooNE uses data-driven background predictions, we discuss the uncertainties affecting the relation between the signal sample and the control sample. In the case of the single-photon background, we emphasize the uncertainties in the radiative branching ratios of heavy hadronic resonances. We find that not even a combination of uncertainties in different channels adding up unfavorably (an “Altarelli cocktail”) appears to be sufficient to resolve the MiniBooNE anomaly. We finally investigate how modified background predictions affect the fit of a sterile neutrino scenario. We carefully account for full four-flavor oscillations not only in the signal but also in the background and control samples. We emphasize that, because of the strong correlation between MiniBooNE’s and samples, a sterile neutrino mixing only with is sufficient to explain the anomaly, even though the well-known tension with external constraints on disappearance persists.
- Authors:
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1873034
- Alternate Identifier(s):
- OSTI ID: 1832795
- Report Number(s):
- CERN-TH-2021-131; FERMILAB-PUB-21-450-T; MITP-21-042; NUHEP-TH/21-14; arXiv:2109.08157
Journal ID: ISSN 2470-0010; PRVDAQ; 115024
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 105 Journal Issue: 11; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Neutrino interactions; Particle mixing & oscillations
Citation Formats
Brdar, Vedran, and Kopp, Joachim. Can standard model and experimental uncertainties resolve the MiniBooNE anomaly?. United States: N. p., 2022.
Web. doi:10.1103/PhysRevD.105.115024.
Brdar, Vedran, & Kopp, Joachim. Can standard model and experimental uncertainties resolve the MiniBooNE anomaly?. United States. https://doi.org/10.1103/PhysRevD.105.115024
Brdar, Vedran, and Kopp, Joachim. Fri .
"Can standard model and experimental uncertainties resolve the MiniBooNE anomaly?". United States. https://doi.org/10.1103/PhysRevD.105.115024.
@article{osti_1873034,
title = {Can standard model and experimental uncertainties resolve the MiniBooNE anomaly?},
author = {Brdar, Vedran and Kopp, Joachim},
abstractNote = {We closely examine a number of theoretical uncertainties affecting the MiniBooNE short-baseline neutrino oscillation experiment in an attempt to better understand the observed excess of electronlike events. We reexamine the impact of fake charged current quasielastic events, the background due to neutral current π0 production, and the single-photon background. For all processes, we compare the predictions of different event generators (genie, gibuu, nuance, and nuwro) and, for genie, of different tunes. Where MiniBooNE uses data-driven background predictions, we discuss the uncertainties affecting the relation between the signal sample and the control sample. In the case of the single-photon background, we emphasize the uncertainties in the radiative branching ratios of heavy hadronic resonances. We find that not even a combination of uncertainties in different channels adding up unfavorably (an “Altarelli cocktail”) appears to be sufficient to resolve the MiniBooNE anomaly. We finally investigate how modified background predictions affect the fit of a 3+1 sterile neutrino scenario. We carefully account for full four-flavor oscillations not only in the signal but also in the background and control samples. We emphasize that, because of the strong correlation between MiniBooNE’s νe and νμ samples, a sterile neutrino mixing only with νμ is sufficient to explain the anomaly, even though the well-known tension with external constraints on νμ disappearance persists.},
doi = {10.1103/PhysRevD.105.115024},
journal = {Physical Review D},
number = 11,
volume = 105,
place = {United States},
year = {Fri Jun 17 00:00:00 EDT 2022},
month = {Fri Jun 17 00:00:00 EDT 2022}
}
https://doi.org/10.1103/PhysRevD.105.115024
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