6533b838fe1ef96bd12a3d93
RESEARCH PRODUCT
Robustness of braneworld scenarios against tensorial perturbations
L. LosanoR. MenezesR. MenezesGonzalo J. OlmoGonzalo J. OlmoD. BazeiaDiego Rubiera-garciasubject
PhysicsHigh Energy Physics - TheoryGravity (chemistry)Physics and Astronomy (miscellaneous)FOS: Physical sciencesPositive-definite matrixGeneral Relativity and Quantum Cosmology (gr-qc)General Relativity and Quantum CosmologyGravitationsymbols.namesakeGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theory (hep-th)Metric (mathematics)symbolsBraneEinsteinScalar fieldRicci curvatureMathematical physicsdescription
Inspired by the peculiarities of the effective geometry of crystalline structures, we reconsider thick brane scenarios from a metric-affine perspective. We show that for a rather general family of theories of gravity, whose Lagrangian is an arbitrary function of the metric and the Ricci tensor, the background and scalar field equations can be written in first-order form, and tensorial perturbations have a non negative definite spectrum, which makes them stable under linear perturbations regardless of the form of the gravity Lagrangian. We find, in particular, that the tensorial zero modes are exactly the same as predicted by Einstein's theory regardless of the scalar field and gravitational Lagrangians.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-16 |