标题： 有流 MSSM 的现象学 显示英文标题

标题： Phenomenology of a Fluxed MSSM

摘要： 我们分析了一组受IIB型弦理论Orientifold模型中由通量诱导的超对称（SUSY）破缺启发而得到的极小超对称标准模型（MSSM）软项的唯象学。 该方案极为受限，本质上只有两个自由的质量参数：一个设定软项尺度的参数M，以及μ参数。 在施加一致的辐射电弱对称性破缺（EWSB）条件后，该模型依赖于单一的质量参数（例如，M）。 尽管受到如此限制，我们仍发现它与EWSB条件一致。 我们证明了这些条件对于μ<0有两个解，而对于μ>0则没有解。 tanβ作为一个预测结果出现，并且对于其中一个解大约为3-5，对于另一个解大约为25-40，这取决于M和顶夸克质量。 我们进一步考察了来自b→sγ、μ子g-2、Higgs质量限制以及WMAP暗物质约束对该模型的额外限制。 MSSM谱系以单一自由参数M的形式被预测。低tanβ分支与相对较轻的谱系一致，但它只在最轻的中性子不稳定的情况下才与标准宇宙学兼容。 高tanβ分支与所有唯象学约束一致，但具有相当重的谱系。 我们论证了如果基础理论中存在附加关系μ=-2M，则这种重谱系所关联的精细调整将会大大改善。 显示英文摘要

摘要： We analyze the phenomenology of a set of minimal supersymmetric standard model (MSSM) soft terms inspired by flux-induced supersymmetry (SUSY)-breaking in Type IIB string orientifolds. The scheme is extremely constrained with essentially only two free mass parameters: a parameter M, which sets the scale of soft terms, and the mu parameter. After imposing consistent radiative electro-weak symmetry breaking (EWSB) the model depends upon one mass parameter (say, M). In spite of being so constrained one finds consistency with EWSB conditions. We demonstrate that those conditions have two solutions for mu<0, and none for mu>0. The parameter tan beta results as a prediction and is approximately 3-5 for one solution, and 25-40 for the other, depending upon M and the top mass. We examine further constraints on the model coming from b->s gamma, the muon g-2, Higgs mass limits and WMAP constraints on dark matter. The MSSM spectrum is predicted in terms of the single free parameter M. The low tan beta branch is consistent with a relatively light spectrum although it is compatible with standard cosmology only if the lightest neutralino is unstable. The high tan beta branch is compatible with all phenomenological constraints, but has quite a heavy spectrum. We argue that the fine-tuning associated to this heavy spectrum would be substantially ameliorated if an additional relationship mu=-2M were present in the underlying theory.