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arXiv 1606.08356hep-ph
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关于MSSM真空稳定性的新观点

A new view on vacuum stability in the MSSM

Wolfgang Gregor Hollik

摘要:

高能物理的一致性理论描述需要评估真空在标准模型或其任何扩展中的稳定性,特别是超对称扩展允许多个真空,并且所需电弱真空的选择对参数空间有很强的约束。由于最小超对称标准模型中的一般参数空间很大,任何与直接唯象观测无关的严格约束都会增强模型的可预测性。我们执行更新的分析可能的电荷和颜色打破最小值,而不依赖于固定的方向,在字段空间中,最大限度地减少某些条款的潜力(称为“D-平坦”方向)。关于假真空的宇宙学稳定性,我们认为在位形空间中总有方向导致非常短命的真空,因此这种排除是严格的。除了现有的强约束的参数空间,我们发现更强的约束扩展场空间相比,以前的分析,并结合这些约束与预测的光CP-甚至希格斯质量的最小超对称标准模型。低质量的超对称合作伙伴被排除在真空稳定性与125 GeV的希格斯粒子和允许的参数空间打开在几个TeV。

英文摘要:

A consistent theoretical description of physics at high energies requires an assessment of vacuum stability in either the Standard Model or any extension of it. Especially supersymmetric extensions allow for several vacua and the choice of the desired electroweak one gives strong constraints on the parameter space. As the general parameter space in the Minimal Supersymmetric Standard Model is huge, any severe constraint on it unrelated to direct phenomenological observations enhances the predictability of the model. We perform an updated analysis of possible charge and color breaking minima without relying on fixed directions in field space that minimize certain terms in the potential (known as "D-flat" directions). Concerning the cosmological stability of false vacua, we argue that there are always directions in configuration space which lead to very short-lived vacua and therefore such exclusions are strict. In addition to existing strong constraints on the parameter space, we find even stronger constraints extending the field space compared to previous analyses and combine those constraints with predictions for the light CP-even Higgs mass in the Minimal Supersymmetric Standard Model. Low masses for supersymmetric partners are excluded from vacuum stability in combination with the 125 GeV Higgs and the allowed parameter space opens at a few TeV.

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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