94 resultados para ultra high energy cosmic rays


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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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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)