The shape of the electron is perfectly spherical and its dipole is zero — as best as we can tell
from Nature News
The standard model of particle physics predicts that the electron is slightly aspherical and has an infinitesimal dipole moment. Extensions to the theory and improved experimental sensitivities
recently reported in Nature News
have brought the predicted electron dipole moment and the ability to measure it closer together. Still the electron is observed to be nearly perfectly spherical with a zero dipole. The results raise profound questions about anti-matter and time-reversal symmetry.
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