Algebraic Aspects of the Background Fiel
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Ruggero Ferrari; Marco Picariello; Andrea Quadri
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Article
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2001
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Elsevier Science
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English
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The background field method allows the evaluation of the effective action by exploiting the (background) gauge invariance, which in general yields Ward identities, i.e., linear relations among the vertex functions. In the present approach an extra gauge fixing term is introduced right at the beginni