Chiral Lagrangians and the QCD string
We propose a method to derive the low-energy effective action of QCD assuming that the long-distance properties of strong interactions can be described by a string theory. We bypass the usual problems related to the existence of the tachyon and absence of the adequate Adler zero by using a sigma mod...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 1999 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/58724 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/58724 |
| Access Level: | Acceso aberto |
| Palavra-chave: | 53 Models Supergravity Fields Física (Física) 22 Física |
| Resumo: | We propose a method to derive the low-energy effective action of QCD assuming that the long-distance properties of strong interactions can be described by a string theory. We bypass the usual problems related to the existence of the tachyon and absence of the adequate Adler zero by using a sigma model approach where excitations above the correct (chirally non-invariant) QCD vacuum are included. Two-dimensional conformal invariance then implies the vanishing of the O(p(4)) effective lagrangian coefficients. We interpret this result and discuss ways to go beyond this limit. |
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