Nuclear physics insights for new-physics searches using nuclei: neutrinoless double-beta decay and dark matter direct detection
Nuclear physics insights for new-physics searches using nuclei: neutrinoless double-beta decay and dark matter direct detection
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使用原子核进行新物理学搜索的核物理见解：无中微子双β衰变和暗物质直接探测
DOI：
10.1051/epjconf/201713708011
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Menendez
中科院分区：
文献类型：
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作者：
岩田 礼;岩田 礼;李 仲民;岩田 礼;J. Menendez
利用原子核探测标准模型之外的新物理现象的实验，比如测试中微子是否为自身反粒子的无中微子ββ衰变搜索，以及旨在确定暗物质本质的直接探测实验，都需要精确的核物理输入，以优化它们的发现潜力，并正确解释它们的结果。这就要求对这些过程相关的核结构有详细的了解。例如，中微子ββ衰变核矩阵元素对初始和最终核中的核相关非常敏感，暗物质散射的自旋相关核结构因子依赖于所有核子之间的核自旋的细微分布。此外，核子是复合的，相互作用强，这意味着许多核子过程是正确描述核子及其相互作用所必需的。因此，理论研究和实验分析必须考虑β衰变和暗物质相互作用与两个核子的耦合，称为双核子电流。
Experiments using nuclei to probe new physics beyond the Standard Model, such as neutrinolessββdecay searches testing whether neutrinos are their own antiparticle, and direct detection experiments aiming to identify the nature of dark matter, require accurate nuclear physics input for optimizing their discovery potential and for a correct interpretation of their results. This demands a detailed knowledge of the nuclear structure relevant for these processes. For instance, neutrinolessββdecay nuclear matrix elements are very sensitive to the nuclear correlations in the initial and final nuclei, and the spin-dependent nuclear structure factors of dark matter scattering depend on the subtle distribution of the nuclear spin among all nucleons. In addition, nucleons are composite and strongly interacting, which implies that many-nucleon processes are necessary for a correct description of nuclei and their interactions. It is thus crucial that theoretical studies and experimental analyses considerβdecays and dark matter interactions with a coupling to two nucleons, called two-nucleon currents.