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arXiv · 2104.03292

Muon g-2 and CP violation in MSSM

Chengcheng Han
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Abstract

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 $\sigma$ 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[$\mu M_1]$ or Arg[$\mu M_2]$ should be smaller than $\mathcal O$(2-3)$\times10^{-5}$. 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 $\mathcal O(10^{-5})$ is needed to cancel the phase in a general CP violated SUSY model.

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Chengcheng Han. 2021-04-07. Muon g-2 and CP violation in MSSM. https://arxiv.org/abs/2104.03292

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