β-decay asymmetry parameter for ^{35}Ar: An anomaly resolved

A remeasurement of the β-decay asymmetry parameter for ${}_{}{}^{35}{}_{}{}^{}\mathrm{Ar}$ decay to the ground state of ${}_{}{}^{35}{}_{}{}^{}\mathrm{Cl}$ has been performed. The result, $A_0$=0.49±0.10, leads to a value for the quark mixing angle ${\theta }_C$=0.28±0.08 rad, in agreement with the accepted value 0.23±0.01 and in strong disagreement with the anomalous result ${\theta }_C$<0.10 (95% confidence level) determined from previous measurements of this asymmetry parameter.