Gauge mediation with sequestered supersymmetry breaking
Gauge mediation with sequestered supersymmetry breaking
复制标题
DOI：
10.1103/physrevd.78.075003
复制
发表时间：
2008-08
影响因子：
5
通讯作者：
S. Shirai;F. Takahashi;T. Yanagida;Kazuya Yonekura
中科院分区：
文献类型：
--
作者：
S. Shirai;F. Takahashi;T. Yanagida;Kazuya Yonekura
规范中介模型有两个缺点，即所谓的{mu}问题和引力暗物质丰度缺乏可预测性。我们表明，超对称破缺区域中的共形隔离为这两个问题提供了有吸引力的解决方案。 {mu} 和 B{sub {mu}} 项的正确质量标度是通过采用 O(100) GeV 的引力质量生成的。这开启了一种可能性，即中性子（而不是引力子）是最轻的超对称粒子，并且是暗物质的候选粒子，即使在规范介导中也是如此。令人惊讶的是，超对称破缺场的大异常尺寸可以自然地实现共湮灭所需的小stau和中性质量差，从而产生适当丰度的中性暗物质。
Gauge mediation models have two drawbacks, that is, the so-called {mu} problem and a lack of predictability of the gravitino dark matter abundance. We show that conformal sequestering in the supersymmetry breaking sector offers attractive solutions to both problems. The correct mass scale of the {mu} and B{sub {mu}} terms is generated by taking the gravitino mass of O(100) GeV. This opens up a possibility that a neutralino, instead of gravitino, is the lightest supersymmetric particle and a candidate for dark matter, even in the gauge mediation. Surprisingly, a large anomalous dimension of the supersymmetry breaking field can naturally realize the small stau and neutralino mass difference required for the coannihilation to work yielding the right abundance of the neutralino dark matter.