New Physics Searches Using Precision Spectroscopy

TL;DR

This paper reviews how high-precision spectroscopy can be used to detect new physics beyond the Standard Model through atomic and molecular energy level shifts, including tests of QED, fundamental constant variation, and electric dipole moments.

Contribution

It provides a concise overview of recent methods and potential of precision spectroscopy in probing new physics beyond current theories.

Findings

Spectroscopy tests of QED via electron magnetic moment and fine-structure constant.

Searches for temporal variations in fundamental constants.

Investigations of permanent electric dipole moments of electrons and nuclei.

Abstract

The exceptional precision attainable using modern spectroscopic techniques provides a promising avenue to search for signatures of physics beyond the Standard Model in tiny shifts of the energy levels of atoms and molecules. We briefly review three categories of new-physics searches based in precision measurements: tests of QED using measurements of the anomalous magnetic moment of the electron and the value of the fine-structure constant, searches for time variation of the fundamental constants, and searches for a permanent electric dipole moment of an electron or atomic nucleus.