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arXiv 1212.3045hep-ph
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无中微子双β衰变算符的系统分解

Systematic decomposition of the neutrinoless double beta decay operator

Florian Bonnet, Martin Hirsch, Toshihiko Ota, Walter Winter

摘要:

我们讨论了九维无中微子双β衰变算子的系统分解,重点是对中微子质量有潜在小贡献的机制,同时可以在LHC上使用。我们首先提供了一个(d=9树水平)的完整列表的无中微子双β衰变的图表。从这个列表中,我们可以很容易地恢复所有以前讨论过的对无中微子双β衰变过程的贡献,例如著名的质量机制或“奇异”,例如左右对称模型,R宇称破坏超对称性和leptoquark的贡献。然而,更有趣的是,我们发现了许多以前文献中尚未讨论过的新可能性。联系到早期的作品的基础上,一般的洛伦兹不变参数化的中微子双β衰变率,它允许,在原则上,得出限制所有可能的贡献。我们还讨论了可能的信号在大型强子对撞机的介质导致的振幅的短程部分与一个具体的例子。如果中微子质量的不同测量之间存在紧张关系,例如来自无中微子双β衰变和宇宙学或单β衰变的测量,那么对这种贡献的研究将变得特别重要。

英文摘要:

We discuss the systematic decomposition of the dimension nine neutrinoless double beta decay operator, focusing on mechanisms with potentially small contributions to neutrino mass, while being accessible at the LHC. We first provide a (d=9 tree-level) complete list of diagrams for neutrinoless double beta decay. From this list one can easily recover all previously discussed contributions to the neutrinoless double beta decay process, such as the celebrated mass mechanism or "exotics", such as contributions from left-right symmetric models, R-parity violating supersymmetry and leptoquarks. More interestingly, however, we identify a number of new possibilities which have not been discussed in the literature previously. Contact to earlier works based on a general Lorentz-invariant parametrisation of the neutrinoless double beta decay rate is made, which allows, in principle, to derive limits on all possible contributions. We furthermore discuss possible signals at the LHC for mediators leading to the short-range part of the amplitude with one specific example. The study of such contributions would gain particular importance if there were a tension between different measurements of neutrino mass such as coming from neutrinoless double beta decay and cosmology or single beta decay.

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。

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