Patterns of gauge mediation in metastable SUSY breaking
Patterns of gauge mediation in metastable SUSY breaking
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DOI：
10.1088/1126-6708/2008/02/074
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发表时间：
2007-12
影响因子：
5.4
通讯作者：
S. Abel;C. Durnford;J. Jaeckel;V. Khoze
中科院分区：
文献类型：
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作者：
S. Abel;C. Durnford;J. Jaeckel;V. Khoze
亚稳真空中的超对称破缺允许人们建立简单而具体的规范介导模型。产生高吉诺质量需要在真空中R对称性破缺。一般来说，有两种可能的方式打破R对称性，显式或自发。我们发现，MSSM现象学的关键取决于这种突破如何发生在隐藏部门。显式R对称破缺模型可以导致相当标准的规范中介，但我们认为，在ISS型模型的上下文中，这只有在中介尺度下B = 0时才有意义，这会导致高tan β。如果在另一方面，R-对称性是自发破缺，那么R-对称性破坏软项往往被抑制相对于R-对称性保持的，并导致一个场景与大标量质量。这些模型之间的标准规范调解和分裂超对称模型插值。我们为这两种情况提供了基准点。他们表明，特定的动力学的隐藏部门的基本性质的超对称性和R-对称性破缺影响相当大的MSSM的质谱，反之亦然。
Supersymmetry breaking in a metastable vacuum allows one to build simple and concrete models of gauge mediation. Generation of gaugino masses requires that R-symmetry be broken in this vacuum. In general, there are two possible ways to break R-symmetry, explicitly or spontaneously. We find that the MSSM phenomenology depends crucially on how this breaking occurs in the Hidden Sector. Explicit R-symmetry breaking models can lead to fairly standard gauge mediation, but we argue that in the context of ISS-type models this only makes sense if B = 0 at the mediation scale, which leads to high tan β. If on the other hand, R-symmetry is broken spontaneously, then R-symmetry violating soft terms tend to be suppressed with respect to R-symmetry preserving ones, and one is led to a scenario with large scalar masses. These models interpolate between standard gauge mediation and split SUSY models. We provide benchmark points for the two scenarios. They demonstrate that the specific dynamics of the Hidden Sector—the underlying nature of supersymmetry and R-symmetry breaking—affects considerably the mass spectrum of the MSSM, and vice versa.