A compact expression forS-matrix elements in theories with several interacting fields
A compact method of expressing the n-th order S-matrix element in quantum electrodynamics has been given by Caianiello. The generalization of this formula to n-interacting fields of arbitrary character is considered. The specific example of the quantum electrodynamics of spin-0 mesons is treated. Although only two fields are present there are several interactions because of the e2 term in the current and because of the meson-meson renormalization term. Using these methcds a new demonstration is given of the theorem that the terms in the expansion of the S-matrix that depend on the orientation of a family of space-like surfaces vanish identically.
- Research Organization:
- Universita, Naples
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-023515
- OSTI ID:
- 4156850
- Journal Information:
- Nuovo Cimento, Journal Name: Nuovo Cimento Journal Issue: 6 Vol. 16; ISSN 0029-6341
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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