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arXiv 0902.0015hep-ph
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没有小层次结构的SUSY

SUSY without the Little Hierarchy

B. Bellazzini, C. Csaki, A. Delgado, A. Weiler

摘要:

我们提出了一个简单的规范扩展的最小超对称标准模型(MSSM),在希格斯质量参数的微调是大大减少。希格斯玻色子对高能量不敏感,因为它是超对称的,也因为它是一种全局对称的伪戈德斯通玻色子(称为双重保护或超小希格斯机制)。希格斯四次自耦合的大位移是通过来自额外规范群的非解耦D项获得的,导致希格斯粒子可以重至135 GeV,调谐比10%轻。通过适当地选择量子数,我们可以在希格斯质量没有相应移动的情况下产生额外的四次,从而保持希格斯的双重保护。该模型预测了几个顶级伙伴费米子的存在,其中一个可以轻至700 GeV,而普通的MSSM状态可以轻至400 GeV。除了许多多TeV范围内的新粒子外,还将存在与标准模型(SM)物质(可能在亚GeV范围内)和无菌中微子(可能是轻的)非常弱耦合的类轴子状态。

英文摘要:

We propose a simple gauge extension of the minimal supersymmetric standard model (MSSM), where the fine tuning in the Higgs mass parameters is highly reduced. The Higgs boson is insensitive to high energies because of supersymmetry and also because it is a pseudo-Goldstone boson of a global symmetry (referred to as double protection or super-little Higgs mechanism). A large shift in the Higgs quartic self coupling is obtained via a non-decoupling D-term coming from an extra gauge group, resulting in a Higgs that can be as heavy as 135 GeV with a tuning milder than 10%. With an appropriate choice of quantum numbers one can achieve that the additional quartic is generated without a corresponding shift in the Higgs mass, thus preserving the double protection of the Higgs. The model predicts the existence of several top-partner fermions one of which can be as light as 700 GeV, while the ordinary MSSM states could be as light as 400 GeV. In addition to many new particles in the multi-TeV range there would also be an axion-like state very weakly coupled to standard model (SM) matter which could be in the sub-GeV regime, and sterile neutrinos which could be light.

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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