Charge-breaking constraints on left-right mixing of stau's
Charge-breaking constraints on left-right mixing of stau's
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DOI：
10.1016/j.physletb.2010.12.013
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发表时间：
2010-11
影响因子：
4.4
通讯作者：
J. Hisano;Shohei Sugiyama
中科院分区：
文献类型：
--
作者：
J. Hisano;Shohei Sugiyama
在最小超对称标准模型中，从现象学的观点来看，Stau的大的左右混合有时是很有趣的。然而，太大的左右混合是不能接受的，因为弱电击穿真空变成了亚稳态。本文用半经典方法计算了真空转化率，并给出了模型参数的约束条件。在计算中，弹跳解是在多场空间中得到的。这些约束也适用于低能量最小规范调解模型的情况。
In the minimal supersymmetric standard model, large left–right mixing of stau's is sometimes intriguing from phenomenological viewpoints. However, too large left–right mixing is not acceptable since the electroweak-breaking vacuum becomes metastable. In this Letter the vacuum transition rate is evaluated by using semiclassical techniques, and constraints on parameters of the model are shown. In the calculation the bounce solution is derived in the multifield space. These constraints are also applied to the case of the low-energy minimal gauge mediation model.