Measurement of the6s−7ptransition probabilities in atomic cesium and a revised value for the weak chargeQW

We have measured the $6s-{7p}_{1/2,3/2}$ transition probabilities in atomic cesium using a direct absorption technique. We use our result and other previously measured transition rates to derive an accurate value of the vector transition polarizability $\beta$ and, consequently, reevaluate the weak charge $Q_W.$ Our derived value $Q_W=-72.65\left(49\right)\mathrm{}$ agrees with the prediction of the standard model to within one standard deviation.