arXiv 1104.08312011-04-05hep-ph

超对称中微子质量模型的唯象

Phenomenology of supersymmetric neutrino mass models

Avelino Vicente

备注：: Ph. D. thesis. 192 pages. Universitat de València

摘要：

中微子质量的起源是目前粒子物理学中最有趣的问题之一，许多标准模型的扩展已经在这个方向上提出。这个实验证据是新物理学的一个非常有力的指示，但不是超越标准模型的唯一理由。一些理论问题的存在支持了一个更广泛的框架的想法，超对称性是最流行的一个。本文研究了几种超对称中微子质量模型。在第一部分中，非常详细地讨论了具有双线性R-宇称破坏的模型的现象学，突出了对撞机和低能实验中最独特的签名。特别是，LSP衰变和中微子物理之间的相关性被证明是一个强大的工具，把这个家庭的模型进行实验测试。其他重要的签名进行了调查，以及，如在带电轻子衰变的情况下，与自发破缺的R-宇称模型的majoron发射。论文的第二部分采用了一种非常不同的方法。具有左右对称性的超对称模型具有所有的成分，以纳入中微子质量的I型跷跷板机制，并在低能量下保持R宇称。在这种情况下，它只允许间接测试，在高跷跷板规模的中微子质量的产生是在低能量的slepton软质量编码。相反，最低限度的跷跷板模型，相当大的味道违反在正确的斯莱普顿部门预计。它的实验观测将是潜在的左右对称性的明确暗示，提供关于非常高能量的物理学的有价值的信息。

英文摘要：

The origin of neutrino masses is currently one of the most intriguing questions of particle physics and many extensions of the Standard Model have been proposed in that direction. This experimental evidence is a very robust indication of new physics, but is not the only reason to go beyond the Standard Model. The existence of some theoretical issues supports the idea of a wider framework, supersymmetry being the most popular one. In this thesis, several supersymmetric neutrino mass models have been studied. In the first part, the phenomenology of models with bilinear-like R-parity violation is discussed in great detail, highlighting the most distinctive signatures at colliders and low energy experiments. In particular, the correlations between the LSP decay and neutrino physics are shown to be a powerful tool to put this family of models under experimental test. Other important signatures are investigated as well, like majoron emission in charged lepton decays for the case of models with spontaneous breaking of R-parity. A very different approach is followed in the second part of the thesis. Supersymmetric models with a Left-Right symmetry have all the ingredients to incorporate a type-I seesaw mechanism for neutrino masses and conserve R-parity at low energies. In this case, which only allows for indirect tests, the generation of neutrino masses at the high seesaw scale is encoded at low energies in the slepton soft masses. Contrary to minimal seesaw models, sizeable flavor violation in the right slepton sector is expected. Its experimental observation would be a clear hint of an underlying Left-Right symmetry, providing valuable information about physics at very high energies.

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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