论文标题
中微子的自我互动和双β衰减
Neutrino Self-Interactions and Double Beta Decay
论文作者
论文摘要
超出标准模型以外的中微子自我互动（$ν$ si）是软化宇宙学性质限制的有吸引力的可能性，也可以解释哈勃膨胀率的后期和早期时间测量中的张力。 $ν$ si所需的强度以解释$4σ$ hubble的张力是在一种类似于点的有效四边形耦合方面，可以高达$ 10^9 \，g_f $，其中$ g_f $是费米常数。在这项工作中，我们表明如此强大的$ν$ Si会在两次中性双β衰减中造成重大影响，从而导致可观察到的衰减率和频谱畸变的可观察到。我们通过有效的操作员以及通过光标量表介导的自我交织。来自观察到的两中性双β衰减的数据用于约束$ν$ si，该$ν$ si排除了$ 10^9 \，g_f $。
Neutrino Self-Interactions ($ν$SI) beyond the Standard Model are an attractive possibility to soften cosmological constraints on neutrino properties and also to explain the tension in late and early time measurements of the Hubble expansion rate. The required strength of $ν$SI to explain the $4σ$ Hubble tension is in terms of a point-like effective four-fermion coupling that can be as high as $10^9\, G_F$, where $G_F$ is the Fermi constant. In this work, we show that such strong $ν$SI can cause significant effects in two-neutrino double beta decay, leading to an observable enhancement of decay rates and to spectrum distortions. We analyze self-interactions via an effective operator as well as when mediated by a light scalar. Data from observed two-neutrino double beta decay is used to constrain $ν$SI, which rules out the regime around $10^9\, G_F$.
