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Vafa-Witten theorem and Lee-Yang singularities
We show the absence of Lee-Yang singularities in the partition function of QCD close to the CP symmetric point theta=0 in the complex theta plane. Analyticity of the theta vacuum energy density at theta=0 provides a key missing link in the Vafa-Witten proof of absence of spontaneous breaking of pari...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2002
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.80.127702 http://cds.cern.ch/record/547282 |