Effect of the Smaller Mass-Squared Difference for the Long Base-Line Neutrino Experiments(Particles and Fields)
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概要
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Usually, neutrino oscillation experiments are analyzed within the two-flavor framework, which is governed by one mass-squared difference and one mixing angle. But there are six parameters, two mass-squared differences, three mixing angles, and one CP phase, within the three-flavor framework. In this paper, we estimate the effect from the smaller mass-squared difference, the other mixing angles, and the CP phase, which we call the three-flavor effect, for the determination of the mass-squared difference and the mixing angle from the v_μ's survival and transition probabilities with the two-flavor analysis. It is found that the mass-squared difference from the two-flavor analysis is slightly shifted from the larger mass-squared difference by the three-flavor effect. The order of magnitude of the three-flavor effect for the mass-squared difference is comparable with that of the expected error in the mass-squared difference from the two-flavor analysis of future long base-line neutrino oscillation experiments. The CP phase dependence of the v_μ→v_e transition probability is also shown.
- 理論物理学刊行会の論文
- 2005-11-25