Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-05-18
Phys.Rev. D72 (2005) 064018
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
7 pages, 3 figures, revtex
Scientific paper
10.1142/S0217751X05024584
Generalizations of gravitational Born-Infeld type lagrangians are investigated. Phenomenological constraints (reduction to Einstein-Hilbert action for small curvature, spin two ghost freedom and absence of Coulomb like Schwarschild singularity) select one effective lagrangian whose dynamics is dictated by the tensors g_{\mu\nu} and R_{\mu\nu\rho\sigma}(not R_{\mu\nu} or the scalar R).
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