تقرير
Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies
| العنوان: | Updated MiniBooNE Neutrino Oscillation Results with Increased Data and New Background Studies |
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| المؤلفون: | MiniBooNE Collaboration, Aguilar-Arevalo, A. A., Brown, B. C., Conrad, J. M., Dharmapalan, R., Diaz, A., Djurcic, Z., Finley, D. A., Ford, R., Garvey, G. T., Gollapinni, S., Hourlier, A., Huang, E. C., Kamp, N. W., Karagiorgi, G., Katori, T., Kobilarcik, T., Lin, K., Louis, W. C., Mariani, C., Marsh, W., Mills, G. B., Mirabal-Martinez, J., Moore, C. D., Nelson, R. H., Nowak, J., Parmaksiz, I., Pavlovic, Z., Ray, H., Roe, B. P., Russell, A. D., Schneider, A., Shaevitz, M. H., Siegel, H., Spitz, J., Stancu, I., Tayloe, R., Thornton, R. T., Tzanov, M., Van de Water, R. G., White, D. H., Zimmerman, E. D. |
| المصدر: | Phys. Rev. D 103, 052002 (2021) |
| سنة النشر: | 2020 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment |
| مصطلحات موضوعية: | High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Experiment |
| الوصف: | The MiniBooNE experiment at Fermilab reports a total excess of $638.0 \pm 132.8$ electron-like events ($4.8 \sigma$) from a data sample corresponding to $18.75 \times 10^{20}$ protons-on-target in neutrino mode, which is a 46\% increase in the data sample with respect to previously published results, and $11.27 \times 10^{20}$ protons-on-target in antineutrino mode. The additional statistics allow several studies to address questions on the source of the excess. First, we provide two-dimensional plots in visible energy and cosine of the angle of the outgoing lepton, which can provide valuable input to models for the event excess. Second, we test whether the excess may arise from photons that enter the detector from external events or photons exiting the detector from $\pi^0$ decays in two model independent ways. Beam timing information shows that almost all of the excess is in time with neutrinos that interact in the detector. The radius distribution shows that the excess is distributed throughout the volume, while tighter cuts on the fiducal volume increase the significance of the excess. We conclude that models of the event excess based on entering and exiting photons are disfavored. Comment: 28 pages, 26 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.103.052002 |
| الوصول الحر: | http://arxiv.org/abs/2006.16883Test |
| رقم الانضمام: | edsarx.2006.16883 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.103.052002 |
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