Nonperturbative Newtonian coupling in Einstein gravity with Dirac fields
نویسنده
چکیده
– 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. PACS. 04.62-v Quantum field theory in curved spacetime PACS. 04.60-mQuantum gravity. PACS. 12.10DmUnified theories and models of strong electroweak interactions.
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