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RESEARCH PRODUCT
The Gravity Lagrangian According to Solar System Experiments
Gonzalo J. OlmoGonzalo J. Olmosubject
High Energy Physics - TheoryPhysicsGravity (chemistry)SpeedupAstrophysics (astro-ph)FOS: Physical sciencesGeneral Physics and AstronomyGeneral Relativity and Quantum Cosmology (gr-qc)AstrophysicsGeneral Relativity and Quantum CosmologyTheoretical physicsNonlinear systemHigh Energy Physics - Theory (hep-th)Observational cosmologyBounded functionMetric (mathematics)f(R) gravityPerturbation theory (quantum mechanics)description
In this work we show that the gravity lagrangian f(R) at relatively low curvatures in both metric and Palatini formalisms is a bounded function that can only depart from the linearity within the limits defined by well known functions. We obtain those functions by analysing a set of inequalities that any f(R) theory must satisfy in order to be compatible with laboratory and solar system observational constraints. This result implies that the recently suggested f(R) gravity theories with nonlinear terms that dominate at low curvatures are incompatible with observations and, therefore, cannot represent a valid mechanism to justify the cosmic speed-up.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-12-23 | Physical Review Letters |