论文标题
使用Supernova Neutminos用Juno和Theia探测质子的奇怪自旋
Using supernova neutrinos to probe strange spin of proton with JUNO and THEIA
论文作者
论文摘要
奇怪的夸克对Proton自旋（$ΔS$）的贡献是一个基本数量，它是从当前实验中确定的。中微子 - 普罗希望弹性散射（PES）是测量该数量的有前途的通道，需要强烈的低能量中微子和具有出色分辨率的低阈值检测器的强烈来源。在本文中，我们提出，可以利用来自银河系超新星的中微子及其与大容量闪烁探测器中质子的相互作用来确定$ΔS$。可以使用沙丘和超级（超级）kamiokande的组合独立确定超新星中微子的所有口味的光谱。这使我们能够预测Juno和Theia中的PES事件率，并通过与检测到的事件进行比较来估计$ΔS$。我们发现，在1 kpc（10 kpc）的超新星的预计灵敏度约为$ \ pm 0.01 $（$ \ pm 0.15 $）。有趣的是，附近超新星的极限将与晶格QCD的结果相媲美，并且比极化深度无弹性散射实验更好。使用SuperNova Neutminos提供了一个真正的$ Q^2 \ rightarrow 0 $测量，从而提供了$ΔS$的轴向质量独立测定。
The strange quark contribution to proton's spin ($Δs$) is a fundamental quantity that is poorly determined from current experiments. Neutrino-proton elastic scattering (pES) is a promising channel to measure this quantity, and requires an intense source of low-energy neutrinos and a low-threshold detector with excellent resolution. In this paper, we propose that neutrinos from a galactic supernova and their interactions with protons in large-volume scintillation detectors can be utilized to determine $Δs$. The spectra of all flavors of supernova neutrinos can be independently determined using a combination of DUNE and Super-(Hyper-)Kamiokande. This allows us to predict pES event rates in JUNO and THEIA, and estimate $Δs$ by comparing with detected events. We find that the projected sensitivity for a supernova at 1 kpc (10 kpc), is approximately $\pm 0.01$ ($\pm 0.15$). Interestingly, the limits from a nearby supernova would be comparable to the results from lattice QCD, and better than polarized deep-inelastic scattering experiments. Using supernova neutrinos provides a true $Q^2\rightarrow 0$ measurement, and thus an axial-mass independent determination of $Δs$.
