# Measurement of the Stark shift of the $6s^2S_{1/2} \rightarrow 7p^2P_{J} $ transitions in atomic cesium

## TL;DR

This paper reports precise measurements of the Stark shifts in cesium atomic transitions at 456 nm and 459 nm, determining polarizabilities that test theoretical models relevant for fundamental physics experiments.

## Contribution

The study provides the first high-precision measurements of scalar and tensor polarizabilities for specific cesium 7P states, with uncertainties below 1%, advancing atomic physics accuracy.

## Key findings

- Scalar polarizabilities with 0.18% uncertainty
- Tensor polarizability with 0.66% uncertainty
- Results serve as sensitive tests for theoretical models

## Abstract

We report measurements of the Stark shift of the cesium $6s \: ^2S_{3/2} \rightarrow 7p \: ^2P_{3/2} $ and the $6s \: ^2S_{1/2} \rightarrow 7p \: ^2P_{1/2} $ transitions at $\lambda = 456$ nm and 459 nm, respectively, in an atomic beam. From these, we determine the static scalar polarizability for both 7P states, and the tensor polarizability for the 7P$_{3/2}$ state. The fractional uncertainty of the scalar polarizabilites is $\sim$0.18\%, while that of the tensor term is 0.66\%. These measurements provide sensitive tests of theoretical models of the Cs atom, which has played a central role in parity nonconservation measurements.