Abstract
We investigate the bound-state spectrum of a supersymmetric version of QED and calculate the energy of the lowest states of the theory to O(α 4). These states involve a degenerate quartet of spin- 1 2 and spin-zero states (para-states) and a degenerate quartet of spin- 1 2 states associated with an additional spin zero and spin one state (ortho-states). Because of the supersymmetry, the ortho-para splitting in positronium is changed from 7 12 mα 4 to 1 2 mα 4 .
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