Two-loop gluino contributions to the neutron electric dipole moment in the CP-violating minimal supersymmetric standard model

Tai-Fu Feng, Xue-Qian Li, Jukka Maalampi, and Xinmin Zhang

Phys. Rev. D 71, 056005 – Published 29 March 2005

Abstract

We analyze two-loop gluino corrections to the neutron electric dipole moment (EDM) in the minimal supersymmetry extension of the standard model (MSSM). The dependence of two-loop corrections on the relevant CP violating phases differs from that of the one-loop contributions, and there is a region in the parameter space where the two-loop contributions are comparable with the one-loop contributions. Our numerical results show that the two-loop corrections can be as large as $30 %$ of the one-loop results.

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Received 12 December 2004

DOI:https://doi.org/10.1103/PhysRevD.71.056005

Authors & Affiliations

Tai-Fu Feng¹, Xue-Qian Li^2,3, Jukka Maalampi¹, and Xinmin Zhang³

¹Department of Physics, 40014 University of Jyväskylä,Finland
²Department of Physics, Nankai University, Tianjing 300071, People’s Republic of China
³Institute of high energy physics, Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049, People’s Republic of China

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Vol. 71, Iss. 5 — 1 March 2005

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Physical Review D

covering particles, fields, gravitation, and cosmology