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https://locus.ufv.br//handle/123456789/22148
Tipo: | Artigo |
Título: | No parity anomaly in massless QED3 : a BPHZL approach |
Autor(es): | Franco, D. H. T. Cima, O. M. Del Piguet, O. Schweda, M. |
Abstract: | In this Letter we call into question the perturbatively parity breakdown at 1-loop for the massless QED3 frequently claimed in the literature. As long as perturbative quantum field theory is concerned, whether a parity anomaly owing to radiative corrections exists or not shall be definitely proved by using a renormalization method independent of any regularization scheme. Such a problem has been investigated in the framework of BPHZL renormalization method, by adopting the Lowenstein–Zimmermann subtraction scheme. The 1-loop parity-odd contribution to the vacuum-polarization tensor is explicitly computed in the framework of the BPHZL renormalization method. It is shown that a Chern–Simons term is generated at that order induced through the infrared subtractions — which violate parity. We show then that, what is called “parity anomaly”, is in fact a parity-odd counterterm needed for restauring parity. |
Palavras-chave: | QED3 BPHZL |
Editor: | Physics Letters B |
Tipo de Acesso: | Elsevier B.V. |
URI: | https://doi.org/10.1016/j.physletb.2009.08.018 http://www.locus.ufv.br/handle/123456789/22148 |
Data do documento: | 14-Set-2009 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | texto completo | 127,1 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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