Precision on leptonic mixing parameters at future neutrino oscillation experiments
Precision on leptonic mixing parameters at future neutrino oscillation experiments
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DOI：
10.1007/jhep06(2012)073
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发表时间：
2012-03
影响因子：
5.4
通讯作者：
P. Coloma;A. Donini;E. Fernandez-Martinez;P. Hernandez
中科院分区：
文献类型：
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作者：
P. Coloma;A. Donini;E. Fernandez-Martinez;P. Hernandez
假设θ 13在大亚湾最近的测量所指示的范围内，我们根据确定基本参数θ 13和CP相位δ的可达到的精度，对未来不同的中微子振荡实验进行了比较。我们研究了误差对δ真值的非平凡依赖性。当物质效应较小时，在CP破坏最大的点处误差最大，在CP守恒点处误差最小。当物质效应相当大时，情况就不同了。由于这种效应，通常根据CP发现潜力对不同实验的物理范围进行比较，可能会产生误导。我们根据θ 13的相对精度和δ的误差比较了各种建议的超级束、β束和中微子工厂装置。中微子工厂，无论是高能量还是低能量，都胜过替代性的束流技术。在中微子工厂中，θ 13的极限精度在3%以下，δ的误差在1σ（1自由度）≤ 7。
We perform a comparison of the different future neutrino oscillation experiments based on the achievable precision in the determination of the fundamental parameters θ 13 and the CP phase, δ, assuming that θ 13 is in the range indicated by the recent Daya Bay measurement. We study the non-trivial dependence of the error on δ on its true value. When matter effects are small, the largest error is found at the points where CP violation is maximal, and the smallest at the CP conserving points. The situation is different when matter effects are sizable. As a result of this effect, the comparison of the physics reach of different experiments on the basis of the CP discovery potential, as usually done, can be misleading. We have compared various proposed super-beam, beta-beam and neutrino factory setups on the basis of the relative precision of θ 13 and the error on δ. Neutrino factories, both high-energy or low-energy, outperform alternative beam technologies. An ultimate precision on θ 13 below 3% and an error on δ of≤ 7 at 1σ (1 dof) can be obtained at a neutrino factory.