Electric dipole moments of neutron and heavy quarks c, t in CP violating U(1)XSSM

Abstract

We study and analyze the electric dipole moments (EDMs) of neutron and heavy quarks c, t in a CP-violating (CPV) supersymmetric U(1) extension of the standard model called U(1)XSSM, whose local gauge group is U(1)X×SU(3)C×SU(2)L×U(1)Y. The contributions from the one loop diagrams and the Weinberg operators are taken into account with the new introduced CPV phases beyond the minimum supersymmetric standard model (MSSM) being non-zero. Our numerical results show that in U(1)XSSM the neutron EDM can be smaller than its experimental upper bound 1.8×10−26 e⋅cm without a small CPV phase. The magnitudes of EDMs of heavy quarks c and t can reach 10−24 e⋅cm and 10−22 e⋅cm respectively. This is favorable to the study of CPV.