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arXiv 1002.4093hep-thhep-ph
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类矢量规范理论共形窗中的半直接规范中介

Semi-direct Gauge Mediation in Conformal Windows of Vector-like Gauge Theories

T. T. Yanagida, Kazuya Yonekura

摘要:

利用Intriligator-Seiberg-Shih(ISS)亚稳真空的直接规范介导模型存在标准模型规范耦合的朗道极点问题和R对称性的存在,这两个问题都限制了规范质量的存在。这些问题可以通过在具有规范单态的类矢量$SU(N_C)$规范理论的共形窗口中使用最近提出的超对称破缺模型来解决。本文提出了一个基于超对称破缺模型的共形窗规范中介模型,并研究了超对称破缺的动力学性质。在该模型中,存在着大量的类矢量双基本场,它们在$SU(N_C)$和标准模型规范群下都带电,我们的模型可以看作是一个半直接规范中介模型。色数$N_C$可以很小以避免Landau极点问题,并且在对模型强动力学的合理假设下,R对称性也被破缺。这个模型只有一个自由参数,并且高根诺和费米子的质量自然是同阶的。

英文摘要:

Direct gauge mediation models using the Intriligator-Seiberg-Shih (ISS) metastable vacua suffer from the Landau pole problem of the standard model gauge couplings and the existence of R symmetry forbidding gaugino masses. These problems may be solved by using the recently proposed SUSY breaking models in a conformal window of the vector-like $SU(N_C)$ gauge theory with gauge singlets. In this paper we propose a model of gauge mediation based on the SUSY-breaking model in the conformal window, and study the dynamics for the SUSY breaking. In the model, there are massive vector-like bifundamental fields charged under both $SU(N_C)$ and the standard model gauge group, and our model can be regarded as a semi-direct gauge mediation model. The color number $N_C$ can be small to avoid the Landau pole problem, and the R symmetry is also broken under a reasonable assumption on the strong dynamics of the model. The model possesses only one free parameter, and the gaugino and sfermion masses are naturally of the same order.

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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