The impact of hierarchy upon the values of neutrino mixing parameters
| Autor: | Escamilla-Roa, J., Latimer, D. C., Ernst, D. J. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys.Rev.C82:028501,2010 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.82.028501 |
| Popis: | A neutrino-oscillation analysis is performed of the more finely binned Super-K atmospheric, MINOS, and CHOOZ data in order to examine the impact of neutrino hierarchy in this data set upon the value of $\theta_{13}$ and the deviation of $\theta_{23}$ from maximal mixing. Exact oscillation probabilities are used, thus incorporating all powers of $\theta_{13}$ and $\epsilon :=\theta_{23}-\pi/4$. The extracted oscillation parameters are found to be dependent on the hierarchy, particularly for $\theta_{13}$. We find at 90% CL are $\Delta_{32} = 2.44^{+0.26}_{-0.20}$ and $2.48^{+0.25}_{-0.22}\times 10^{-3} {\rm eV}^2$, $\epsilon=\theta_{23}-\pi/4=0.06^{+0.06}_{-0.16}$ and $0.06^{+0.08}_{-0.17}$, and $\theta_{13}=-0.07^{+0.18}_{-0.11}$ and $-0.13^{+0.23}_{-0.16}$, for the normal and inverted hierarchy respectively. The inverted hierarchy is preferred at a statistically insignificant level of 0.3 $\sigma$. Comment: 4 pages, 2 figure |
| Databáze: | arXiv |
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