Nonperturbative Newtonian coupling in Einstein gravity with Dirac fields

Details Nonperturbative Newtonian coupling in Einstein gravity with Dirac fields Nonperturbative Newtonian coupling in Einstein gravity with Dirac fields

2005-01-28

arxiv.org/abs/hep-th/0501239v1

Nuovo Cim. B114 (1999) 509-514

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, LaTeX, minor typos corrected

Scientific paper

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

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