Parity non-conservation in rubidium atom

TL;DR

This paper calculates the parity non-conservation amplitude in rubidium atoms, showing that rubidium is a promising candidate for testing physics beyond the standard model with potentially higher accuracy than cesium.

Contribution

The authors provide detailed calculations of PNC amplitudes in rubidium, highlighting its suitability for precise measurements and potential to improve constraints on new physics.

Findings

Rubidium's PNC amplitude can be calculated with higher accuracy than cesium.

Rubidium is a promising candidate for new physics searches beyond the standard model.

Calculated nuclear spin-dependent PNC amplitude for extracting the nuclear anapole moment.

Abstract

Currently the theoretical uncertainty limits the interpretation of the atomic parity non-conservation (PNC) measurements. We calculate the PNC $5s$ - $6s$ electric dipole transition amplitude in rubidium and demonstrate that rubidium is a good candidate to search for new physics beyond the standard model since accuracy of the atomic calculations in rubidium can be higher than in cesium. PNC in cesium is currently the best low-energy test of the standard model, therefore, similar measurements for rubidium present a good option for further progress in the field. We also calculate nuclear spin-dependent part of the parity non-conserving (PNC) amplitude which is needed for the extraction of the nuclear anapole moment from the PNC measurements.