Vacuum Polarization and the Electric Charge of the Positron
B. Mueller, M. H. Thoma
Abstract
We show that higher-order vacuum polarization would contribute a measureable net charge to atoms, if the charges of electrons and positrons do not balance precisely. We obtain the limit |Qe+Q e| < 10-18 e for the sum of the charges of electron and positron. This also constitutes a new bound on certain violations of PCT invariance.
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