论文标题
中微子和暗物质的无弹性核散射
Inelastic nuclear scattering from neutrinos and dark matter
论文作者
论文摘要
具有10〜MEV能量的中微子（例如，从之前的腐烂来源）是研究与核的低能中微子相互作用的宝贵工具 - 以前可以首先测量相干的弹性中性中微子核核散射。除了弹性散射，中微子和暗物质之外，在该能量范围内，还激发了其低洼的核态，从而提供了额外的物理通道。 Here, we consider neutral-current inelastic neutrino-nucleus and dark matter(DM)-nucleus scattering off $^{40}$Ar, $^{133}$Cs, and $^{127}$I nuclei that are relevant to a number of low-threshold neutrino experiments at pion decay-at-rest facilities.考虑到完整的Electroweak多极操作员，我们对非弹性横截面进行了大规模的核壳模型计算。我们的结果表明，Gamow-Teller转变为横截面提供了主要贡献，并且长波长极限为中微子源的总横截面提供了合理的近似值。我们表明，未来的实验将对此通道敏感，因此这些结果提供了额外的中微子和DM散射通道，可以在暂时腐烂的设施进行探索。
Neutrinos with energy of order 10~MeV, such as from pion decay-at-rest sources, are an invaluable tool for studying low-energy neutrino interactions with nuclei -- previously enabling the first measurement of coherent elastic neutrino-nucleus scattering. Beyond elastic scattering, neutrinos and dark matter in this energy range also excite nuclei to its low-lying nuclear states, providing an additional physics channel. Here, we consider neutral-current inelastic neutrino-nucleus and dark matter(DM)-nucleus scattering off $^{40}$Ar, $^{133}$Cs, and $^{127}$I nuclei that are relevant to a number of low-threshold neutrino experiments at pion decay-at-rest facilities. We carry out large scale nuclear shell model calculations of the inelastic cross sections considering the full set of electroweak multipole operators. Our results demonstrate that Gamow-Teller transitions provide the dominant contribution to the cross section and that the long-wavelength limit provides a reasonable approximation to the total cross section for neutrino sources. We show that future experiments will be sensitive to this channel and thus these results provide additional neutrino and DM scattering channels to explore at pion decay-at-rest facilities.
