2005/01/28 by L. N. Granda
Physics and Astronomy · #hep-th
published as Nuovo Cim. B114 (1999) 509-514 · 7 pages, LaTeX, minor typos corrected
arxiv created 2005/01/28 · arxiv updated 2009/12/01
We investigate the exact renormalization group (RG) in Einstein gravity coupled to N-component spinor field, working in the effective average action formalism and background field method. The truncated evolution equation is obtained for the Newtonian and cosmological constants. We have shown that screening or antiscreening behaviour of the gravitational coupling depends crucially on the number of spinor components