Electric dipole moments of p, n, 2H+, and 3He2+

Permanent electric dipole moments (EDMs) are signatures of time-reversal, or equivalently, CP violation. With novel techniques developed for storage rings making EDM measurements of charged particles possible, we review current theoretical calculations of p, n, image, and image, and show how these experiments in combination could offer a good starting point to constrain the landscape of hadronic CP violation.