EXACT RENORMALIZATION-GROUP AND RUNNING NEWTONIAN COUPLING IN HIGHER-DERIVATIVE GRAVITY

Authors
BYTSENKO AA GRANDA LN ODINTSOV SD
Citation
Aa. Bytsenko et al., EXACT RENORMALIZATION-GROUP AND RUNNING NEWTONIAN COUPLING IN HIGHER-DERIVATIVE GRAVITY, JETP letters, 65(8), 1997, pp. 600-604
Citations number
14
Categorie Soggetti
Physics
Journal title
JETP letters → ACNP
ISSN journal
00213640
Volume
65
Issue
8
Year of publication
1997
Pages
600 - 604
Database
ISI
SICI code
0021-3640(1997)65:8<600:ERARNC>2.0.ZU;2-Q
Abstract
We discuss exact renormalization group (RG) in R-2 gravity using the e ffective average action formalism, The truncated evolution equation fo r such a theory against the de Sitter background leads to a system of nonperturbative RC equations for cosmological and gravitational coupli ng constants. An approximate solution of these RG equations shows that antiscreening or screening behavior of the Newtonian coupling arises, depending on the higher-derivative coupling constants. (C) 1997 Ameri can Institute of Physics.