Reactor Neutrino Experiments Compared to Superbeams
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We present a detailed quantitative discussion of the measurement of the leptonic mixing angle $\sin^2 2 θ_{13}$ with a future reactor neutrino oscillation experiment consisting of a near and far detector. We perform a thorough analysis of the impact of various systematical errors and compare the resulting physics potential to the one of planned first-generation superbeam experiments. Furthermore, we investigate the complementarity of both types of experiments. We find that, under realistic assumptions, a determination of $\sin^2 2 θ_{13}$ down to $10^{-2}$ is possible with reactor experiments. They are thus highly competitive to first-generation superbeams and may be able to test $\sin^2 2 θ_{13}$ on shorter timescales. In addition, we find that the combination of a KamLAND-size reactor experiment with one or two superbeams could substantially improve the ability to access the neutrino mass hierarchy or the leptonic CP phase.
Typo in Eq. (9) corrected. 36 pages, 12 figures
Typo in Eq. (9) corrected. 36 pages, 12 figures