The heavy gravitino, naturalness, and sizable anomaly mediation
The heavy gravitino, naturalness, and sizable anomaly mediation
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沉重的重力、自然性和相当大的异常调解
DOI：
10.1093/ptep/ptu118
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Takayama
中科院分区：
文献类型：
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作者：
N. Maekawa;K. Takayama
我们考虑解决引力问题和其他超对称（SUSY）破缺参数是为了自然的情况。我们指出，异常调解抵消了重正化群对高吉诺和费米子质量的贡献，而不是停止质量，其尺度称为海市蜃楼尺度。这种情况类似于海市蜃楼调解，其中需要 SUSY 破断参数的特殊边界条件，但对于停止质量和上型希格斯质量，在海市蜃楼尺度上不会发生这种抵消。尽管上型希格斯质量没有被抵消，但我们表明，在这种情况下，小等级问题变得不那么严重。与海市蜃楼中介相比，这种情况的一个优点是停止混合参数可以更大，因此，较小的停止质量对于 125GeV 希格斯粒子来说就足够了。当海市蜃楼尺度在TeV尺度附近时，大统一尺度上重力介导引起的SUSY破断参数可以通过TeV尺度实验直接观测到。
We consider the situation in whichfor solving the gravitino problem and the other supersymmetry (SUSY) breaking parameters arefor the naturalness. We point out that the anomaly mediation cancels out the renormalization group contribution to the gaugino and sfermion masses other than the stop masses at a scale known as the mirage scale. The situation is similar to mirage mediation, in which special boundary conditions for the SUSY breaking parameters are required, though, for the stop masses and the up-type Higgs mass, such cancellation at the mirage scale does not happen. Despite no cancellation for the up-type Higgs mass, we show that the little hierarchy problem becomes less severe in this situation. One advantage of this situation over mirage mediation is that the stop mixing parametercan be larger and, therefore, a smaller stop mass is sufficient for the 125 GeV Higgs. When the mirage scale is around the TeV scale, the SUSY breaking parameters induced by gravity mediation on the grand unification scale can be observed directly by TeV-scale experiments.