arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0807.2457hep-ph
收藏

双β衰变的核物理问题

Nuclear physics aspects of double beta decay

Petr Vogel

摘要:

全面描述的现象学的$ββ$衰变,重点是核物理方面。在简要回顾中微子振荡的结果和检验轻子数守恒的动机之后,讨论了$0νββ$的机制。它的关系,轻子味违反涉及带电轻子和它的使用作为诊断工具的$0νββ$机制的描述。其次,介绍了$ββ$-衰变模式的基本核物理,并导出了衰变率公式。接下来描述所使用的核物理方法,核壳模型和准粒子无规相近似,并且在下一节中讨论输入参数的选择。最后给出了核矩阵元的数值及其不确定性。在附录中,描述了中微子磁矩的寻找与中微子的狄拉克与马约拉纳性质的关系。

英文摘要:

Comprehensive description of the phenomenology of the $ββ$ decay is given, with emphasis on the nuclear physics aspects. After a brief review of the neutrino oscillation results and of motivation to test the lepton number conservation, the mechanism of the $0νββ$ is discussed. Its relation to the lepton flavor violation involving charged leptons and its use as a diagnostic tool of the $0νββ$ mechanism is described. Next the basic nuclear physics of both $ββ$-decay modes is presented, and the decay rate formulae derived. The nuclear physics methods used, the nuclear shell model and the quasiparticle random phase approximation, are described next, and the choice of input parameters is discussed in the following section. Finally, the numerical values of the nuclear matrix elements, and their uncertainty, are presented. In the appendix the relation of the search for the neutrino magnetic moment to the Dirac versus Majorana nature of neutrinos is described.

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。

↑