Born-Infeld type Gravity
D. Comelli
Abstract
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 gμν and Rμνρσ(not Rμν or the scalar R).
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