Electric dipole moments of charged particles

Authors
Citation
Pgh. Sandars, Electric dipole moments of charged particles, CONT PHYS, 42(2), 2001, pp. 97-111
Citations number
43
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Physics
Journal title
CONTEMPORARY PHYSICS
ISSN journal
0010-7514 → ACNP
Volume
42
Issue
2
Year of publication
2001
Pages
97 - 111
Database
ISI
SICI code
0010-7514(200103/04)42:2<97:EDMOCP>2.0.ZU;2-O
Abstract
The existence of an electric dipole moment (edm) on a fundamental atomic pa rticle would imply violation of both parity and time-reversal invariance. A n edm on a neutral particle is detectable through its interaction with an a pplied electric field. The search for edms on charged particles such as the nucleus or the electron is made di? cult by their acceleration in an elect ric field; conversely, a charged particle in equilibrium must be shielded f rom the field and the edm interaction will then vanish. A number of ingenio us ways around this shielding theorem are discussed, as are the use of pola r molecules to amplify the residual edm interactions. A range of atomic and molecular beam and optical pumping experiments are described and the resul ts tabulated. The implications for particle theories beyond the standard mo del are briefly summarized.