Why the early Universe preferred the non-supersymmetric vacuum: part II
Why the early Universe preferred the non-supersymmetric vacuum: part II
复制标题
为什么早期宇宙更喜欢非超对称真空：第二部分
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
V. Khoze
中科院分区：
文献类型：
--
作者：
S. Abel;J. Jaeckel;V. Khoze
最近在[1]中表明，在具有亚稳态超对称破缺真空的ISS模型的背景下，热效应通常会将宇宙推向亚稳态真空，即使它在保持超对称性的膨胀之后开始。我们继续这个计划，并特别考虑到两个新的影响。第一个是在约束超对称保持真空的规范自由度的质量间隙的效果，第二，是超对称破坏ISS部门的MSSM部门的反作用的效果。它示出，即使质量间隙是参数小于，vevs，它大大降低了所需的温度宇宙被驱动到亚稳态真空：基本上任何温度大于超对称性破缺规模？就足够了另一方面，我们也发现，任何合理的传输超对称破缺MSSM部门没有影响的真空过渡，和超对称破缺真空的稳定性。我们得出的结论是，对于这些模型，早期宇宙最终确实处于超对称破坏真空中。
It was recently shown in [1] that in the context of the ISS models with a metastable supersymmetry breaking vacuum, thermal effects generically drive the Universe to the metastable vacuum even if it began after inflation in the supersymmetry-preserving one. We continue this programme and specifically take into account two new effects. First is the effect of the mass-gap of the gauge degrees of freedom in the confining supersymmetry preserving vacua, and second, is the effect of the back reaction of the MSSM sector on the SUSY breaking ISS sector. It is shown that, even though the mass-gap is parametrically smaller than the , vevs, it drastically reduces the temperature required for the Universe to be driven to the metastable vacuum: essentially any temperature larger than the supersymmetry breaking scale ? is sufficient. On the other hand we also find that any reasonable transmission of SUSY breaking to the MSSM sector has no effect on the vacuum transitions to, and the stability of the SUSY breaking vacuum. We conclude that for these models the early Universe does end up in the SUSY breaking vacuum.