General relativity and precision tests of fundamental symmetries

TL;DR

This paper reviews recent developments in testing fundamental symmetries through electric dipole moment searches, highlighting the impact of Earth's gravity and space-time curvature on experimental sensitivity.

Contribution

It introduces the concept of geometric magnetic fields in electrostatic systems on rotating Earth, advancing understanding of gravity's influence on precision symmetry tests.

Findings

Spurious signals from Earth's gravity can significantly affect EDM measurements.

Geometric magnetic fields are crucial in interpreting results of electrostatic experiments.

Recent developments improve sensitivity to CP violation beyond the Standard Model.

Abstract

Search for the Electric Dipole Moment of nuclear particles is at the forefront of incessant quest for CP violation beyond Standard Model. The ultimate target is to reach a sensitivity to the electric dipole moment of neutrons, protons, deuterons etc. at the level of $\sim 10^{-15}$ nuclear magnetons. Defying the common lore on weakness of gravity, spurious signals induced by curved space-time in the gravity field of the rotating Earth become quite substantial at such a daunting sensitivity. We review the recent development in the field with an emphasis on the geometric magnetic field in pure electrostatic systems at rest on the rotating Earth.