We examine contributions to the anomalous magnetic moment of the muon from weak-isosinglet squarks found in ${\mathrm{E}}_6$ superstring models. We find that such contributions are up to 2 orders of magnitude larger than those previously calculated and correspondingly require smaller Yukawa couplings in order to maintain agreement with the measured muon anomalous magnetic moment.

• Received 15 October 1987

DOI:https://doi.org/10.1103/PhysRevD.37.2012