论文标题
用宇宙学和陆地探测器揭开狄拉克中微子
Unraveling the Dirac Neutrino with Cosmological and Terrestrial Detectors
论文作者
论文摘要
我们指出的是，物种的有效程度$Δn_\ text {eff} $之间的相关性，宇宙学测量的$ m_ {ν，c，\ text {nortrile}}^{\ text {\ text {eff}} $，以及陆状测量的中性质量和有效的电子中心质量$ _____________________________________________________________________ $ m_ {ν_e} $，在狄拉克中微子假设中产生。如果中微子是狄拉克颗粒，并且主动中微子的无菌伴侣曾经在早期的宇宙中得到热量化，那么这个新的宇宙学遗物将同时促进相对论物种的有效数量，$Δn_\ text {eff} $，也导致相关性之间的相关性有效性地群体中性群体中的selile squologologicalmeasecormentile selimemearmeaseal Meadrino中群体中的相关性之间的相关性$ m_ {ν，\ text {norile}}^\ text {eff} $和陆上测量的活动中微子质量$σm_ν$。我们强调，在$Δn_\ text {eff} \ gtrsim 3 $，$ m_ {ν，c，\ text {nitrile}}^\ text {eff} $和$σm_ν$之上的标准预测上可能是预测的标准预测，可以揭示中性元素的尘土。我们提供了几个基准示例，包括乳胶生成，可预测无菌伴侣的热遗物群体，并通过当前和近乎未来的实验讨论相关的观察前景。如果在将来的调查中观察到这项工作中突出的相关性，则可以解释为支持狄拉克中微子质量的证据。
We point out a correlation between the effective number of relativistic degrees of species $ΔN_\text{eff}$, the cosmologically measured $m_{ν,\text{sterile}}^{\text{eff}}$, and the terrestrially measured neutrino mass sum and effective electron neutrino mass, $Σm_ν$ and $m_{ν_e}$, which arises in the Dirac neutrino hypothesis. If the neutrinos are Dirac particles, and if the active neutrinos' sterile partners were once thermalized in the early universe, then this new cosmological relic would simultaneously contribute to the effective number of relativistic species, $ΔN_\text{eff}$, and also lead to a correlation between the cosmologically-measured effective sterile neutrino mass $m_{ν,\text{sterile}}^\text{eff}$ and the terrestrially-measured active neutrino mass sum $Σm_ν$. We emphasize that specifically correlated deviations in $ΔN_\text{eff}\gtrsim 3$, $m_{ν,\text{sterile}}^\text{eff}$ and $Σm_ν$ above their standard predictions could be the harbinger revealing the Dirac nature of neutrinos. We provide several benchmark examples, including Dirac leptogenesis, that predict a thermal relic population of the sterile partners, and we discuss the relevant observational prospects with current and near-future experiments. If the correlation highlighted in this work is observed in future surveys, it could be interpreted as supporting evidence of Dirac neutrino masses.
