论文标题
从头开始限制中微子双β衰减矩阵元素
Constraining Neutrinoless Double-Beta Decay Matrix Elements from Ab Initio Nuclear Theory
论文作者
论文摘要
随着对中准less双β（$0νβ$）衰减的实验性搜索进入新一代，希望完全探测倒数质量层次结构，因此对可靠的核基质元素的需求（控制了这种衰减的速率）比以往任何时候都更强。由于通常使用核模型发现结果存在很大的差异，因此这些实验对有效中微子质量的敏感性仍然存在很大的未知。我们从第一原理的角度考虑了这个问题，使用中等相似性重归其化组的缩写价空间。特别是，我们研究了$^{76} $ ge中$0νβ$ -decay矩阵元素与其他可观察物的相关性，例如来自34个输入性手性的手性相互作用，以限制我们的不确定性并研究核矩阵元素的相互作用依赖性。
As experimental searches for neutrinoless double-beta ($0νββ$) decay are entering a new generation, with hopes to completely probe the inverted mass hierarchy, the need for reliable nuclear matrix elements, which govern the rate of this decay, is stronger than ever. Since a large discrepancy in results is typically found with nuclear modela, a large unknown still exists on the sensitivity of these experiments to the effective neutrino mass. We consider this problem from a first-principles perspective, using the ab initio valence-space in medium similarity renormalization group. In particular, we study correlations of the $0νββ$-decay matrix elements in $^{76}$Ge with other observables, such as the double Gamow-Teller giant resonance, from 34 input chiral interactions in an attempt to constrain our uncertainties and investigate the interaction dependence of the nuclear matrix element.
