arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2407.02795nucl-thhep-ph
收藏

左右对称模型下无中微子双β衰变的核壳模型研究

Nuclear shell model study of neutrinoless double beta decay under Left-Right symmetric model

Dong-Liang Fang, B. Alex Brown, Fedor Šimkovic

AI总结:

本研究采用大规模核壳模型计算左右对称模型下四种核素的无中微子双β衰变核矩阵元,系统比较η与λ机制各贡献项,并由现有实验约束m_ββ、λ和η。

摘要:

我们利用大规模核壳模型,在左右对称模型框架内,针对⁷⁶Ge、⁸²Se、¹³⁰Te和¹³⁶Xe四种原子核,计算了由中微子介导的无中微子双β衰变的核矩阵元。我们对相关机制中不同项的总体大小进行了系统分析。对于η机制,我们发现弱磁R项主导衰变率,而p波效应受到抑制。对于λ机制,ω项与q项具有同等重要性。对于后一个q项,观察到来自弱磁MM部分的重要贡献。最后,我们给出了当前实验对新物理参数m_ββ、λ和η的约束。

英文摘要:

We use the large scale nuclear shell model to calculate the nuclear matrix elements for the neutrino mediated neutrinoless double beta decay within the Left-Right symmetric model for four nuclei: $^{76}$Ge, $^{82}$Se, $^{130}$Te and $^{136}$Xe. We perform a systematic analysis on the general magnitude of different terms for related mechanisms. For the $η$ mechanism, we find that the weak magnetism $R$ term dominates the decay rate while the $p$-wave effect is suppressed. While for the $λ$ mechanism, the $ω$ and the $q$ terms are with equal importance. For the latter $q$ term, important contributions from weak-magnetism MM part are observed. Finally, we give the constraints on the new physics parameters $m_{ββ}$, $λ$ and $η$ from current experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑