학술논문
MiniBooNE and MicroBooNE Combined Fit to a 3+1 Sterile Neutrino Scenario
Document Type
Working Paper
Author
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.; Pavlovic, Z.; Ray, H.; Roe, B. P.; Russell, A. D.; Schneider, A.; Shaevitz, M. H.; Spitz, J.; Stancu, I.; Tayloe, R.; Thornton, R. T.; Tzanov, M.; Van de Water, R. G.; White, D. H.; Zimmerman, E. D.
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Subject
Language
Abstract
This letter presents the results from the MiniBooNE experiment within a full "3+1" scenario where one sterile neutrino is introduced to the three-active-neutrino picture. In addition to electron-neutrino appearance at short-baselines, this scenario also allows for disappearance of the muon-neutrino and electron-neutrino fluxes in the Booster Neutrino Beam, which is shared by the MicroBooNE experiment. We present the 3+1 fit to the MiniBooNE electron-(anti)neutrino and muon-(anti)neutrino data alone, and in combination with MicroBooNE electron-neutrino data. The best-fit parameters of the combined fit with the exclusive CCQE analysis (inclusive analysis) are $\Delta m^2 = 0.29 eV^2 (0.33 eV^2)$, $|U_{e4}|^2 = 0.016 (0.500)$, $|U_{\mu 4}|^2 = 0.500 (0.500)$, and $\sin^2(2\theta_{\mu e})=0.0316 (1.0)$. Comparing the no-oscillation scenario to the 3+1 model, the data prefer the 3+1 model with a $\Delta \chi^2/\text{dof} = 24.7 / 3 (17.3 / 3)$, a $4.3\sigma (3.4\sigma)$ preference assuming the asymptotic approximation given by Wilks' theorem.
Comment: 10 pages, 4 figures, 2 table
Comment: 10 pages, 4 figures, 2 table