论文标题
$0νβ$衰减的光中微子交换和短期机制的分析
Analysis of Light Neutrino Exchange and Short-Range Mechanisms in $0νββ$ Decay
论文作者
论文摘要
中微子双β衰减（$0νββ$）是对Lepton数字违规的关键测试。观察此过程将对中微子物理学，超出标准模型和宇宙学的理论具有根本的影响。我们集中在所谓的$0νββ$的短距离运算符及其与标准光主要中微子交换的潜在相互作用上，我们介绍了在相互作用的玻色子模型（IBM-2）中执行的相关核基质元件的第一个完整计算。此外，我们考虑了电子云的有限核大小和筛选，使用精确的狄拉克电子波函数来计算相关的相空间因子。在IBM-2框架中，获得的数值结果与标准质量机理的最新限制以及有效的$0νβ$短距离运算符一起提出。最后，我们解释了粒子物理场景中的限制，其中包含了沉重的无菌中微子，左右对称性和违反超对称性的R-Parity。
Neutrinoless double beta decay ($0νββ$) is a crucial test for lepton number violation. Observation of this process would have fundamental implications for neutrino physics, theories beyond the Standard Model and cosmology. Focussing on so called short-range operators of $0νββ$ and their potential interplay with the standard light Majorana neutrino exchange, we present the first complete calculation of the relevant nuclear matrix elements, performed within the interacting boson model (IBM-2). Furthermore, we calculate the relevant phase space factors using exact Dirac electron wavefunctions, taking into account the finite nuclear size and screening by the electron cloud. The obtained numerical results are presented together with up-to-date limits on the standard mass mechanism and effective $0νββ$ short-range operators in the IBM-2 framework. Finally, we interpret the limits in the particle physics scenarios incorporating heavy sterile neutrinos, Left-Right symmetry and R-parity violating supersymmetry.
