论文标题
估计太阳中微子$^8 $ b中微子通量的遗物中微子密度的上微子密度的估计
Estimation of an Upper Limit on the Density of Relic Neutrinos in the Sun via the Solar $^8$B Neutrino Flux
论文作者
论文摘要
预计来自早期宇宙的遗物中微子的数量密度相对较大，但能量极低。因此，唯一可能的相互作用是通过中微子捕获在β核核上进行的。如果遗物中微子是通过在太阳中的β核核捕获的，那么通常从这些核的衰减中出现的中微子会因中微子实验中注册的太阳中微子数量而缺少。在太阳中，发现$ {}^8 \ mathrm {b} $，发现CNO循环的三个核适用于这种过程。讨论了他们的横截面以及对观察到的太阳中微子数量的可能影响。假设标准中微子振荡，没有观察到中微子通量测量与太阳标准模型的预测的偏差，并相应地得出了上限。
Relic neutrinos from the early universe are predicted to have a relatively large number density, but extremely low energies. Hence, the only possible interaction proceeds via neutrino capture on beta-decaying nuclei. In case relic neutrinos are captured by beta-decaying nuclei in the Sun, the neutrinos normally emerging from the decay of these nuclei will be missing from the overall number of solar neutrinos registered in neutrino experiments. Within the Sun, ${}^8\mathrm{B}$ and three nuclei from the CNO cycle are found to be suitable for this kind of process. Their cross section as well as the possible impact on the observed number of solar neutrinos are discussed. Assuming standard neutrino oscillations, no deviations of neutrino flux measurements from the predictions of the solar standard model are observed and upper limits are derived accordingly.
