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arXiv 1708.09548hep-ph
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大额外维中微子与短基线$ν_e$现象

Neutrinos in Large Extra Dimensions and Short-Baseline $ν_e$ Appearance

Marcela Carena, Ying-Ying Li, Camila S. Machado, Pedro A. N. Machado, Carlos E. M. Wagner

摘要:

我们发现,在存在大量质量的情况下,无菌中微子在大额外维(LED)中的传播可以引起电子中微子外观效应。这与标准LED方案中发生的情况相反,因此具有明确体质量的LED模型有可能解决MiniBooNE和LSND外观结果以及反应堆和镓异常。在我们的方案中,一个特殊的功能是,混合的第一KK模式的活跃中微子可以被抑制,使较重的无菌中微子振荡的贡献相对更重要。我们研究了当前和未来的中微子振荡实验的中微子质量产生机制的影响,并表明,在费米实验室的短基线中微子计划将能够有效地探测这样的情况。此外,这个框架导致大量狄拉克中微子,从而排除了无中微子双β衰变实验中的任何信号。

英文摘要:

We show that, in the presence of bulk masses, sterile neutrinos propagating in large extra dimensions (LED) can induce electron-neutrino appearance effects. This is in contrast to what happens in the standard LED scenario and hence LED models with explicit bulk masses have the potential to address the MiniBooNE and LSND appearance results, as well as the reactor and Gallium anomalies. A special feature in our scenario is that the mixing of the first KK modes to active neutrinos can be suppressed, making the contribution of heavier sterile neutrinos to oscillations relatively more important. We study the implications of this neutrino mass generation mechanism for current and future neutrino oscillation experiments, and show that the Short-Baseline Neutrino Program at Fermilab will be able to efficiently probe such a scenario. In addition, this framework leads to massive Dirac neutrinos and thus precludes any signal in neutrinoless double beta decay experiments.

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