Muon g-2 and CP violation in MSSM

Muon g-2 and CP violation in MSSM
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MSSM 中的 Muon g-2 和 CP 破坏

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发表时间:
2021
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通讯作者:
C. Han
C. Han
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作者:
C. Han

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本文研究了在前两代具有普适slepton质量的最小超对称标准模型中μ子g − 2优先区域CP破坏的约束条件。我们提出了两种特殊的情况,其中g − 2异常主要通过chargino环或bino环在2 σ水平内预测。我们发现,对于这两种情况,电子EDM实验已经高度限制了参数的CP相位:Arg[μM1]或Arg[μM2]应该小于O(2-3)×10−5。如果μ介子g − 2的异常可以用MSSM来解释,那么就需要一种特殊的超对称性破缺机制来保证超对称性参数的小CP相位。否则,需要O(10−5)的调谐来消除一般CP违反的SUSY模型中的相位。
We study the constraints of the CP violation in the muon g − 2 preferred region of the minimal supersymmetric standard model assuming a universal slepton masses within first two generations. We present two particular scenarios where the g − 2 anomaly is predicted within 2 σ level mainly through the chargino loop or the bino loop. We found that for both cases the electron EDM experiment already highly constrained the CP phase of the parameters: either the Arg[μM1] or Arg[μM2] should be smaller than O(2-3)×10−5. If the muon g − 2 anomaly is explained by the MSSM, a particular SUSY breaking mechanism is needed to guarantee the small CP phase of SUSY parameters. Otherwise, a tuning of O(10−5) is needed to cancel the phase in a general CP violated SUSY model.