Convolutions of particle Green's functions
The use of Feynman causal function in the perturbative treatment of the S-matrix made the computation of convolutions an easy and well-known procedure for free-particle propagators. But the convolution of its components, like the δ and principal values among themselves, is very rarely looked upon. I...
Guardado en:
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
1992
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| Sumario: | The use of Feynman causal function in the perturbative treatment of the S-matrix made the computation of convolutions an easy and well-known procedure for free-particle propagators. But the convolution of its components, like the δ and principal values among themselves, is very rarely looked upon. In field theories with higher-order equations of motion some of these convolutions appear as the fundamental ingredients. A discussion of these convolutions is explicitly done in the simplest examples. © 1992 Società Italiana di Fisica. |
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| ISSN: | 03693546 |
| DOI: | 10.1007/BF02730867 |