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arXiv 1404.4564hep-phhep-th
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自上而下和自下而上超越标准模型的探索:超对称中左右对称的例子

Top-down and bottom-up excursions beyond the Standard Model: The example of left-right symmetries in supersymmetry

Adam Alloul

摘要:

在这篇博士论文中,提出了三个主要项目。第一部分研究了左右对称超对称模型中的中性伴子和电荷扇的现象学。经过详细的动机的研究和建设这样的模型,它表明,这些模型可以很容易地发现在多轻子的最终状态,因为它们导致的签名非常不同于那些诱导的标准模型或其超对称版本。在第二个项目中,我们专注于与双电荷粒子相关的现象学。从LHC发现了这种粒子的假设出发,我们根据粒子所属的SU(2)_L表示及其自旋建立了几种有效场论,并进行了Monte Carlo分析,突出了一些有助于确定其量子数的关键观测量。我的论文的另一部分是对现象学工作的补充,包括开发可能有助于现象学研究的计算机程序。在Mathematica软件包FeynRules的框架下工作,我参与了一个例程的开发,该例程能够自动提取任何可重整化超对称模型的双回路水平上的重整化群方程的解析表达式。我还参与了FeynRules的另一个模块的开发,该模块能够自动提取与FeynRules中实现的任何模型相关的质量矩阵的解析表达式,并以C++源代码的形式导出这些方程,该源代码能够对角化矩阵并将混合矩阵以及光谱存储在SLHA兼容文件中。

英文摘要:

In this Ph.D thesis three main projects are presented. In the first one the phenomenology associated with the neutralinos and charginos sector of the left-right symmetric supersymmetric model is explored. After a detailed motivation of the study and construction of such models, it is shown that these models can be easily discovered in multi-leptonic final states as they lead to signatures very different from those induced by the Standard Model or its supersymmetric version. In the second project, we concentrate on the phenomenology associated with doubly-charged particles. Starting from the hypothesis that such a particle is discovered at the LHC, we build several effective field theories depending on both the representation under SU(2)_L to which they belong the particle and their spin and perform a Monte Carlo analysis highlighting some key observables that would help to determine their quantum numbers. Another part of my thesis, complementary to the phenomenology work, has consisted in developping computer programs that might be helpful for phenomenological studies. Working in the framework of the Mathematica package FeynRules, I took part in the development of a routine able to extract automatically the analytical expressions of the renormalization group equations at the two-loop level for any renormalizable supersymmetric model. I have also been involved in the development of another module of FeynRules able to extract automatically the analytical expressions for the mass matrices associated to any model implemented in FeynRules and to export these equations in the form of a C++ source code able to diagonalize the matrices and store the mixing matrices as well as the spectrum in an SLHA-compliant file.

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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