论文标题
沙丘上的中微子隐形衰减：多通道分析
Neutrino Invisible Decay at DUNE: a multi-channel analysis
论文作者
论文摘要
中微子质量本征的衰变的假设导致了风味本征态的外观和消失概率的实质性修饰。我们研究了最重的质量特征态$ν_3$（带有质量$ m_3 $和平均寿命$τ_3$）对标准振荡方案的影响。我们发现，如果衰减参数$τ_3/m_3 $，可以设置$ 5.1 \ times 10^{-11} 〜s/ev $，如果中性数据包含在分析中，则可以设置90 \％cl的下限，从而设置了$τ_3/m_3 $。我们还表明，$ν_τ$外观通道只会对衰减参数约束提供可忽略的贡献。我们的数值结果通过分析公式通过真空中的外观和消失概率（这是对看不见的衰减模型的研究的有用近似）来证实的，我们已经开发了太阳质量分裂中的二阶以及衰减因子$ t/τ_3$中的所有订单。
The hypothesis of the decay of neutrino mass eigenstates leads to a substantial modification of the appearance and disappearance probabilities of flavor eigenstates. We investigate the impact on the standard oscillation scenario caused by the decay of the heaviest mass eigenstate $ν_3$ (with a mass $m_3$ and a mean life $τ_3$) to a sterile state in DUNE. We find that the lower bound of $5.1 \times 10^{-11}~s/eV$ at 90\% CL on the decay parameter $τ_3/m_3$ can be set if the Neutral Current data are included in the analysis, thus providing the best long-baseline expected limit so far. We also show that the $ν_τ$ appearance channel would give only a negligible contribution to the decay parameter constraints. Our numerical results are corroborated by analytical formulae for the appearance and disappearance probabilities in vacuum (which is a useful approximation for the study of the invisible decay model) that we have developed up to the second order in the solar mass splitting and to all orders in the decay factor $t/τ_3$.
