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Lezioni di Meccanica Quantistica Relativistica A. Bottino e C ... - INFN

Lezioni di Meccanica Quantistica Relativistica A. Bottino e C ... - INFN

Lezioni di Meccanica Quantistica Relativistica A. Bottino e C ... - INFN

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(A)x ′ 0 > x 0Im p 0✻✠Im p 0✻■✲−E ✲✖ ✕✲✗ ✔ ✲+E✲Re p 0✲−E ✲✖ ✕✲✗ ✔ ✲+E✲Re p 0■✠(B)x ′ 0 < x 0Figura H.1: Chiusura del cammino <strong>di</strong> integrazione <strong>di</strong> Feynman.102

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