An Atomic Linear Stark Shift Violating P But Not T Arising From the Electroweak Nuclear Anapole Moment

Abstract

We propose a direct method of detection of the nuclear anapole moment. It is based on the existence of a linear Stark shift for alkali atoms in their ground state perturbed by a quadrupolar interaction potential and a magnetic field. This shift is proportional to the T-even pseudoscalar built from the quadrupolar potential symmetry axis, the directions of the applied electric and magnetic fields.It involves on the one hand the anisotropy of the hyperfine interaction induced by the quadrupolar interaction and, on the other,the static electric dipole moment arising from electroweak interactions inside the nucleus. The case of ground state cesium atoms trapped in a uniaxial (hcp) phase of solid helium-4 is examined. From an explicit evaluation of both the hyperfine structure anisotropy and the static P-odd T-even dipole deduced from recent empirical data about the cesium nuclear anapole moment, we predict the Stark shift. It is three times the experimental upper bound to be set on the T-odd Stark shift of free cesium atoms in order to improve the present limit on the electron EDM.

31 pages, 3 PostScript figures

References in corpus (1)

• A new limit on the permanent electric dipole moment of ^{199}Hg

Cited by in corpus (12)

• Measurement of the parity violating 6S-7S transition amplitude in cesium achieved within 2 \times 10^{-13} atomic-unit accuracy by stimulated-emission detection
• Standard Model tests with trapped radioactive atoms
• Commissioning of the Francium Trapping Facility at TRIUMF
• Parity nonconserving interactions of electrons in chiral molecules with cosmic fields
• A linear Stark shift in dressed atoms as a signal to measure a nuclear anapole moment with a cold atom fountain or interferometer
• The anapole moments in disk-form MS-wave ferrite particle
• Manifestations of nuclear anapole moments in solid state NMR
• Spectral properties of interacting magnetoelectric particles
• Search for anisotropic effects of hcp solid helium on optical lines of cesium impurities
• Polarizabilities as Probes for P, T, and PT Violation
• A possibility for precise Weinberg angle measurement in centrosymmetric crystals with axis
• Efficient atomization of cesium metal in solid helium by low energy (10 $\mu$J) femtosecond pulses