Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond

Jonathan Engel, Michael J. Ramsey-Musolf, U. Van Kolck

Research output: Contribution to journalReview articlepeer-review

342 Scopus citations


Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within the Standard Model and beyond the Standard Model (BSM). The interpretation of experimental EDM limits requires careful delineation of physics at a wide range of scales, from the long-range atomic and molecular scales to the short-distance dynamics of physics at or beyond the Fermi scale. In this review, we provide a framework for disentangling contributions from physics at these disparate scales, building out from the set of dimension four and six effective operators that embody CP violation at the Fermi scale. We survey computations of hadronic and nuclear matrix elements associated with Fermi-scale CP violation in systems of experimental interest and quantify the present level of theoretical uncertainty in these calculations. Using representative BSM scenarios of current interest, we discuss ways in which the interplay of physics at various scales can generate EDMs at a potentially observable level.

Original languageEnglish (US)
Pages (from-to)21-74
Number of pages54
JournalProgress in Particle and Nuclear Physics
StatePublished - Jul 2013


  • Dipole moments
  • Symmetry tests
  • Time-reversal violation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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