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The c-quark EDM and production of $h_c$ in $e^+e^-$ annihilation

Xiao-Jun Bi·Tai-Fu Feng·Xue-Qian Li·Jukka Maalampi·Xinmin Zhang
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Abstract

We analyze the charm quark electric dipole moment (EDM) in the minimal supersymmetric extension of the standard model (MSSM), including important two-loop gluino contributions. Considering the experimental constraint on the neutron EDM, the theoretical prediction for the charm quark EDM can reach about $10^{-20}e\cdot cm$. If taking into account the mixing between the scharm and stop quarks in the effective supersymmetry scenario, the charm quark EDM can be enhanced to $\sim 10^{-19}e\cdot cm$. Direct production of the CP-odd $^1P_1$ state $h_c$ in $e^+e^-$ annihilation via the CP-violating process at the BES-III and CLEO-C is analyzed.

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Xiao-Jun Bi, Tai-Fu Feng, Xue-Qian Li, Jukka Maalampi, Xinmin Zhang. 2004-12-23. The c-quark EDM and production of $h_c$ in $e^+e^-$ annihilation. https://arxiv.org/abs/hep-ph/0412360

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