UNITARITY AND CAUSALITY IN A RENORMALIZABLE FIELD THEORY WITH UNSTABLE PARTICLES
The problems of unitarity, causaility, and renormalizability are treated in a field theory containing an unstable particle. Perturbation theory is suitably modified and leads to an implicit equation for complete propagators. The S-matrix constructed with these propagators and connecting stable particle states only is shown to be unitary, renormalizable, and causal. It is also shown to give rise to interpolating Heisenberg fields that verify the original field equations. (auth)
- Research Organization:
- Rijksuniversiteit, Utrecht
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-022498
- OSTI ID:
- 4726660
- Journal Information:
- Physica, Journal Name: Physica Vol. Vol: 29
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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