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Type: Artigo de Periódico
Title: Higher derivative quantum gravity near four dimensions
Author: Berredo-Peixoto, Guilherme de
Shapiro, Ilya Lvovich
Resumo: -
Abstract: We investigate the role of the Gauss-Bonnet term for the n = 4 and n = 4-e renormalization group, for both conformal and general versions of the theory. The cancellation of the quantum effects of the Gauss-Bonnet term in the n = 4 limit represents an efficient test for the correctness of previous calculations and also resolves two long-standing problems concerning quantum corrections in quantum gravity. In the case of n = 4-e renormalization group there is a number of new nontrivial fixed points, that may indicate to a rich nonperturbative structure of the theory. At the same time, if we do not treat e as a small parameter, the renormalization group is spoiled by an extensive gauge fixing ambiguity.
Keywords: -
CNPq: -
Language: eng
Country: Brasil
Publisher: -
Institution Initials: -
Access Type: Acesso Aberto
Issue Date: Dec-2005
Appears in Collections:Artigos de Periódicos

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