SOME TWO-LOOP CONTRIBUTIONS TO MUON MAGNETIC DIPOLE MOMENT IN THE CP-VIOLATING MSSM

作者：Zhao Shu Min^*; Wang Fang; Chen Biao; Feng Tai Fu; Zhang Hai Bin; Guo Xing Dao; Zhan Xi Jie

来源：Modern Physics Letters A, 2013, 28(40): 1350173.

DOI：10.1142/S0217732313501733

• Two-loop
• anomalous magnetic dipole moment
• on-shell

In the CP-violating minimal supersymmetric extension of the Standard Model (MSSM), we study the two-loop diagrams without the one-loop self-energy, and they are composed of virtual neutralino-slepton-Z. We obtain electroweak corrections to the anomalous magnetic dipole moment (MDM) of muon. With electromagnetic gauge invariance, the Wilson coefficients of dimension-5 operators contributing to the MDM of muon are deduced. To remove the ultra-violet divergences induced by the divergent sub-diagrams, we use the on-shell scheme. The numerical results are about 8.8 x 10(-11), i.e, at the same order of present experimental precision, which indicates these two-loop diagrams are important.

• 出版日期2013-12-28
• 单位河北大学