论文标题
在稀有介子衰变中对两个准脱位重型无菌中微子的研究
The study of two quasi-degenerate heavy sterile neutrinos in rare meson decays
论文作者
论文摘要
在这项工作中，我们研究了$ k^\ pm $和$ d^\ pm $梅森的Lepton-number-violating过程。假定两个准脱位无菌中微子诱导这种过程。与仅涉及一个无菌中微子的情况不同，在这里，混合参数的CP阶段可以提供相当大的贡献。反过来，这将影响由分支部分的实验上限确定的混合参数的绝对值。提出了一种表达两代和一代混合参数差异的一般函数。讨论了与参数具有特定关系的特殊情况。此外，我们还彻底研究了此类过程的CP违反效果。结果表明，通常$ \ MATHCAL A_ {CP} $是无菌中微子质量的函数。
In this work, we study the lepton-number-violating processes of $K^\pm$ and $D^\pm$ mesons. Two quasi-degenerate sterile neutrinos are assumed to induce such processes. Different with the case where only one sterile neutrino involves, here, the CP phases of the mixing parameters could give sizable contribution. This, in turn, would affect the absolute values of the mixing parameters determined by the experimental upper limits of the branching fractions. A general function which express the difference of the mixing parameters for two-generation and one-generation is presented. Special cases with specific relations of the parameters are discussed. Besides, we also thoroughly investigate the CP violation effect of such processes. It is shown that generally $\mathcal A_{CP}$ is a function of the sterile neutrino mass.
