论文标题
宇宙中微子背景的限制
Limits on the cosmic neutrino background
论文作者
论文摘要
我们对宇宙中微子背景（c $ν$ b）的约束进行了首次全面讨论，包括广泛中微子质量和温度的理论，实验和宇宙学限制。此外，我们计算了未来直接和间接中微子检测实验的敏感性，并将结果与现有约束进行比较，从而通过考虑到C $ν$ b参考框架可能与地球的差异不一致，从而扩展了几个先前的分析。 Pauli的排除原则在小型中微子群众处强烈不满意$η_ν\ gg 1 $，但允许过度繁殖$η_ν\ Lessim 125 $ 125 $ 125 $在Katrin bound Bound $m_ν\ simeq 0.8 \，\ simeq 0.8 \，\ simeq 0.8 \，\ mathrm {ev} $。另一方面，在所有情况下，宇宙学强烈利用$ 0.2 \ Lesssimη_ν\ Lessim 3.5 $。我们发现，直接检测建议能够观察C $ν$ B，而中微子质量没有明显的过度密度，$m_ν\ gtrsim 50 \，\ mathrm {mev} $，但需要过度$η_ν\ gtrsim 3 \ gtrsim 3 \ times 10^5 \ times 10^5 $。我们还证明了遗物中微子检测提案对C $ν$ B的螺旋成分敏感，而有些人可能能够区分Dirac和Majora Majorana Neutminos。
We present the first comprehensive discussion of constraints on the cosmic neutrino background (C$ν$B) overdensity, including theoretical, experimental and cosmological limits for a wide range of neutrino masses and temperatures. Additionally, we calculate the sensitivities of future direct and indirect relic neutrino detection experiments and compare the results with the existing constraints, extending several previous analyses by taking into account that the C$ν$B reference frame may not be aligned with that of the Earth. The Pauli exclusion principle strongly disfavours overdensities $η_ν\gg 1$ at small neutrino masses, but allows for overdensities $η_ν\lesssim 125$ at the KATRIN mass bound $m_ν \simeq 0.8\,\mathrm{eV}$. On the other hand, cosmology strongly favours $0.2 \lesssim η_ν \lesssim 3.5$ in all scenarios. We find that direct detection proposals are capable of observing the C$ν$B without a significant overdensity for neutrino masses $m_ν \gtrsim 50\,\mathrm{meV}$, but require an overdensity $η_ν \gtrsim 3\times 10^5$ outside of this range. We also demonstrate that relic neutrino detection proposals are sensitive to the helicity composition of the C$ν$B, whilst some may be able to distinguish between Dirac and Majorana neutrinos.
