论文标题
$^{48} $ ca中性链脱β衰减的耦合群集计算
Coupled-cluster calculations of neutrinoless double-beta decay in $^{48}$Ca
论文作者
论文摘要
我们使用手性有效场理论的耦合群集理论和核相互作用来计算$^{48} $ Ca的中性s中性链酸衰变的核基质元素。在几个光核中使用无核壳模型的基准测试为我们提供了方法的准确性。对于$^{48} $ ca，我们找到一个相对较小的矩阵元素。我们还计算了$^{48} $ ca的两种中性双β衰减的核矩阵元素，并在$^{48} $ ca [Gysbers等人的$^{48} $^{48} $ ca [Gysbers等，Nature Phystics 15，428-428-43-431（2019年）的Ab-Initio计算中得出了从两体电流中推导的静止因子。
We use coupled-cluster theory and nuclear interactions from chiral effective field theory to compute the nuclear matrix element for the neutrinoless double-beta decay of $^{48}$Ca. Benchmarks with the no-core shell model in several light nuclei inform us about the accuracy of our approach. For $^{48}$Ca we find a relatively small matrix element. We also compute the nuclear matrix element for the two-neutrino double-beta decay of $^{48}$Ca with a quenching factor deduced from two-body currents in recent ab-initio calculation of the Ikeda sum-rule in $^{48}$Ca [Gysbers et al., Nature Physics 15, 428-431 (2019)].
