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On the origin of divergences in massless $QED_2$ | | Rodolfo Casana
; Sebastiao Alves Dias
; | | Date: |
6 Jun 2001 | | Journal: | J.Phys. G27 (2001) 1501-1518 | | Subject: | hep-th | | Affiliation: | CBPF), Sebastiao Alves Dias (CBPF/PUC | | Abstract: | We show that ultraviolet divergences found in fermionic Green’s functions of massless $QED_2$ have an essentially non-perturbative nature. We investigate their origin both in gauge invariant formalism (the one where we introduce Wess-Zumino fields to restore quantum gauge invariance) and in gauge non-invariant formalism, mapping two different but equivalent mechanisms responsible for their appearance. We find the same results in both approaches, what contradicts a previous work of Jian-Ge, Qing-Hai and Yao-Yang, that found no divergences in the chiral Schwinger model considered in the gauge invariant formalism. | | Source: | arXiv, hep-th/0106057 | | Services: | Forum | Review | PDF | Favorites | |
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