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arXiv 2301.02503hep-ph
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$d=7$长程$0νββ$衰变算符单圈实现的系统研究

Systematic study of one-loop realizations of $d=7$ long-range $0νββ$ decay operators

Ping-Tao Chen, Gui-Jun Ding, Chang-Yuan Yao

摘要:

研究了7维长程$0νββ$衰变算子的系统单圈分解。我们发现有3个真正的单回路拓扑和8个图。给出了确定内场和外场的SM量子数分配的方法。讨论了长程$0νββ$模型中的Majorana中微子质量。我们还提出了一个单圈$0νββ$衰变模型,在三圈水平上产生Majorana中微子质量。研究了轻中微子质量和$0νββ$衰变半衰期的唯象预言,包括质量机制和长程贡献。

英文摘要:

We study the systematical one-loop decomposition of the dimension-7 long-range $0νββ$ decay operators. We find that there are 3 genuine one-loop topologies and 8 diagrams. The procedure to determine the SM quantum number assignments for both internal and external fields is presented. The Majorana neutrino mass in long-range $0νββ$ models is discussed. We also present a one-loop $0νββ$ decay model which produces Majorana neutrino mass at three-loop level. The phenomenological predictions for light neutrino mass and $0νββ$ decay half-life time including both mass mechanism and long-range contribution are studied.

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