Vacuum energy and the fixed point of QED
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Elsevier B.V.
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Abstract
The vacuum energy of QED, as a function of the coupling constant α, is shown to have an absolute minimum at the critical coupling αc=π/3. The effect of chiral symmetry breaking diminishes as the coupling is increased. We argue that these aspects of the vacuum energy shall remain unaltered beyond the ladder approximation.
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 250, n. 1-2, p. 139-142, 1990.
