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arXiv 1107.2764hep-ph
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SO(10)中的Yukawa统一与光粒子谱

Yukawa unification in SO(10) with light sparticle spectrum

Marcin Badziak, Marek Olechowski, Stefan Pokorski

摘要:

研究了μ<0的超对称SO(10)大统一模型.当标量和高金诺的软质量是非普适的时,可以满足上-下-τ Yukawa统一、正确的辐射电弱对称破缺以及与现有实验数据的一致性的要求。我们展示了如何在SO(10)大统一理论中很容易地得到适当的非普适性,并将其分解为标准模型。本文讨论了在SO(10)模型中,当μ<0时,如何同时得到与实验值符合较好的BR(b-->s γ)和(g-2)μ值。在我们分析的参数空间区域,有两个主要机制导致LSP遗迹丰度与WMAP结果一致。一种是与Stau的共湮灭,另一种是通过Z玻色子或轻希格斯标量交换的共振湮灭。具有负μ的SO(10)模型的一个非常有趣的特征是它们预测相对轻的s粒子谱。即使是最重的超伴子也很容易有低于1.5 TeV的质量,这与具有正μ的模型中典型的多TeV粒子相反。

英文摘要:

We investigate supersymmetric SO(10) GUT model with μ<0. The requirements of top-bottom-tau Yukawa unification, correct radiative electroweak symmetry breaking and agreement with the present experimental data may be met when the soft masses of scalars and gauginos are non-universal. We show how appropriate non-universalities can easily be obtained in the SO(10) GUT broken to the Standard Model. We discuss how values of BR(b-->s γ) and (g-2)_μsimultaneously in a good agreement with the experimental data can be achieved in SO(10) model with μ<0. In the region of the parameter space preferred by our analysis there are two main mechanisms leading to the LSP relic abundance consistent with the WMAP results. One is the co-annihilation with the stau and the second is the resonant annihilation via exchange of the Z boson or the light Higgs scalar. A very interesting feature of SO(10) models with negative μis that they predict relatively light sparticle spectra. Even the heaviest superpartners may easily have masses below 1.5 TeV in contrast to multi-TeV particles typical for models with positive μ.

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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