论文标题
中微子有多宽？
How Broad is a Neutrino?
论文作者
论文摘要
典型的中微子振荡由于从生产到检测的三个质量特征状态的传播而产生。我们渴望在一个简单的框架中捕获一系列新物理学对中微子传播的广泛影响，而这可以通过将中微子传播器推广到一般的Källén -Lehmann形式来完成。在这项工作中，我们演示了如何在这种语言中自然容纳了预测其他传播中微子的额外光种的模型，并提出了一个简单的模型频谱，该模型频谱仅由三个“扩展”状态组成，作为一种灵活的Ansatz，可以探索中微子传播中新物理学的现象学现象学。重新解释了现有的中微子振荡测量值，我们说明了该框架如何系统地和一般地提供与标准三中性场景探测偏离的能力。尽管当前数据允许对扩大的中微子产生相对较强的限制，但我们发现即将进行的Juno实验将产生重大改进，尤其是对于最重的中微子，为对中微子如何在真空中传播的方式铺平了道路。
Canonical neutrino oscillations arise due to the propagation of three mass eigenstates from production to detection. We aspire to capture, in one simple framework, a broad range of new physics effects on neutrino propagation beyond this canonical picture - this can be done by promoting the neutrino propagators to the general Källén-Lehmann form. In this work we demonstrate how models predicting additional light propagating species of neutrino are naturally accommodated in this language and propose a simple model spectrum composed of just three `broadened' states as a flexible ansatz by which to explore the phenomenology of new physics in neutrino propagation. Reinterpreting existing neutrino oscillation measurements, we illustrate how this framework provides the capacity to probe deviations from the standard three-neutrino scenario systematically and generally. Whilst current data allows for relatively strong constraints on broadened neutrinos, we find the upcoming JUNO experiment will yield significant improvements, particularly for the heaviest neutrino, paving the way to a clearer understanding of how neutrinos propagate in vacuum.
