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arXiv 1002.4452hep-phhep-ex
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中微子振荡实验中的表观CPT破坏

Apparent CPT Violation in Neutrino Oscillation Experiments

Netta Engelhardt, Ann E. Nelson, Jonathan R. Walsh

摘要:

我们考虑利用中微子和反中微子的长基线振荡来寻找轻不育费米子和新的力。一个新的光无菌状态和/或一个新的力可以导致明显的CPT破坏μ子中微子和反中微子振荡。作为一个例子,我们提出了一个经济的中微子质量模型包含一个不育中微子。当考虑与轻的无菌中微子混合时,来自标准模型中性流的势引起中微子和反中微子消失概率的差异。B-L相互作用的增加相干地增加了中微子的电流势,并增加了中微子和反中微子消失之间的差异。我们发现,该模型可以提高适合的MINOS的中微子和反中微子的结果,没有任何CPT违反,和参数空间,提高拟合的区域是在实验的限制。

英文摘要:

We consider searching for light sterile fermions and new forces by using long baseline oscillations of neutrinos and antineutrinos. A new light sterile state and/or a new force can lead to apparent CPT violation in muon neutrino and antineutrino oscillations. As an example, we present an economical model of neutrino masses containing a sterile neutrino. The potential from the Standard Model neutral current gives rise to a difference between the disappearance probabilities of neutrinos and antineutrinos, when mixing with a light sterile neutrino is considered. The addition of a B-L interaction adds coherently to the neutrino current potential and increases the difference between neutrino and antineutrino disappearance. We find that this model can improve the fit to the results of MINOS for both neutrinos and antineutrinos, without any CPT violation, and that the regions of parameter space which improve the fit are within experimental constraints.

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