Structural Aspects of the Fermion-Boson Mapping in Two-Dimensional Gauge and Anomalous Gauge Theories with Massive Fermions

Authors: Belvedere L.V.¹; de Souza Dutra A.²; Natividade C.P.¹; de Queiroz A.F.¹

Source: Annals of Physics, Volume 296, Number 1, February 2002 , pp. 98-127(30)

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Abstract:

Using a synthesis of the functional integral and operator approaches we discuss the fermion-boson mapping and the role played by the Bose field algebra in the Hilbert space of two-dimensional gauge and anomalous gauge field theories with massive fermions. In QED₂ with quartic self-interaction among massive fermions, the use of an auxiliary vector field introduces a redundant Bose field algebra that should not be considered as an element of the intrinsic algebraic structure defining the model. In anomalous chiral QED₂ with massive fermions the effect of the chiral anomaly leads to the appearance in the mass operator of a spurious Bose field combination. This phase factor carries no fermion selection rule and the expected absence of Theta -vacuum in the anomalous model is displayed from the operator solution. Even in the anomalous model with massive Fermi fields, the introduction of the Wess–Zumino field replicates the theory, changing neither its algebraic content nor its physical content. © 2002 Elsevier Science (USA).

Language: English

Document Type: Research article

Affiliations: 1: Instituto de Física, Universidade Federal Fluminense, Av. Litorânea, S/N, Boa Viagem, Niterói, Rio de Janeiro, CEP. 24210-340, Brazil 2: DFQ, UNESP, Campus de Guaratinguetá, Guaratinguetá, SP, 12500, Brazil

Publication date: 2002-02-01