Ab initio calculations of electric dipole moments of light nuclei

Abstract

In any finite system, the presence of a non-zero permanent electric dipole moment (EDM) would indicate CP violation beyond the small violation predicted in the Standard Model. Here, we use the ab initio no-core shell model (NCSM) framework to theoretically investigate the magnitude of the nuclear EDM. We calculate EDMs of several light nuclei using chiral two- and three-body interactions and a PT-violating Hamiltonian based on a one-meson-exchange model. We present a benchmark calculation for ${}^3$He, as well as results for the more complex nuclei ${}^{6,7}$Li, ${}^9$Be, ${}^{10,11}$B, ${}^{13}$C, ${}^{14,15}$N, and ${}^{19}$F. Our results suggest that different nuclei can be used to probe different terms of the PT violating interaction. These calculations allow us to suggest which nuclei may be good candidates in the search for a measurable permanent electric dipole moment.

6 pages, 3 figures, matches published version

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• Weinberg Operator Contribution to the Hadronic CP Violation
• Contribution of the Weinberg-type Operator to atomic and nuclear electric dipole moments
• Quark model analysis of the Weinberg operator contribution to the nucleon EDM
• Radioactive Molecules as Laboratories of Fundamental Physics