Preliminary studies for anapole moment measurements in rubidium and francium

TL;DR

This paper explores the feasibility of measuring the nuclear anapole moment in rubidium and francium, highlighting potential for new limits on weak interactions and experimental stability advantages.

Contribution

It presents preliminary studies indicating the possibility of measuring anapole moments in Rb and Fr, with analysis of magnetic field sensitivities and experimental setup.

Findings

Potential to set strong limits on nucleon weak interaction parameters

Identification of low magnetic field values insensitive to first-order changes

Encouraging stability and performance of the dipole trap in Rb experiments

Abstract

Preparations for the anapole measurement in Fr indicate the possibility of performing a similar measurement in a chain of Rb. The sensitivity analysis based on a single nucleon model shows the potential for placing strong limits on the nucleon weak interaction parameters. There are values of the magnetic fields at much lower values than found before that are insensitive to first order changes in the field. The anapole moment effect in Rb corresponds to an equivalent electric field that is eighty times smaller than Fr, but the stability of the isotopes and the current performance of the dipole trap in the apparatus, presented here, are encouraging for pursuing the measurment.