Light sterile neutrino effects atθ13-driven reactor neutrino experiments
| Autor: | Thomas P. Wytock, André de Gouvêa |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Physical Review D. 79 |
| ISSN: | 1550-2368 1550-7998 |
| Popis: | We study the impact of very light sterile neutrinos ($\ensuremath{\Delta}{m}_{\mathrm{new}}^{2}\ensuremath{\in}[1,10]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}\text{ }\text{ }{\mathrm{eV}}^{2}$, ${sin }^{2}2{\ensuremath{\theta}}_{\mathrm{new}}l{10}^{\ensuremath{-}1}$) on analyses of upcoming ${\ensuremath{\theta}}_{13}$-driven reactor antineutrino experiments like Double CHOOZ and Daya Bay. Oscillations driven by these values of $\ensuremath{\Delta}{m}_{\mathrm{new}}^{2}$ affect data in the near and far detectors differently and hence potentially modify the capability of these experimental setups to constrain and measure ${sin }^{2}2{\ensuremath{\theta}}_{13}$. We find that the hypothesis ${\ensuremath{\theta}}_{\mathrm{new}}\ensuremath{\ne}0$ negatively impacts one's ability to place an upper bound on ${sin }^{2}2{\ensuremath{\theta}}_{13}$ in the advent of a no-oscillation signal or to measure ${sin }^{2}2{\ensuremath{\theta}}_{13}$ if a ${\ensuremath{\theta}}_{13}$-driven signal is observed. The impact of sterile neutrino effects, however, depends dramatically on one's ability to measure the recoil positron energy spectrum. If ${sin }^{2}2{\ensuremath{\theta}}_{\mathrm{new}}\ensuremath{\gtrsim}{10}^{\ensuremath{-}2}$, upcoming ${\ensuremath{\theta}}_{13}$-driven reactor antineutrino experiments should be able to measure ${sin }^{2}2{\ensuremath{\theta}}_{\mathrm{new}}$ and $\ensuremath{\Delta}{m}_{\mathrm{new}}^{2}$, along with ${sin }^{2}2{\ensuremath{\theta}}_{13}$, as long as one is sensitive to distortions in the recoil positron energy spectrum in the near (and far) detectors. |
| Databáze: | OpenAIRE |
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