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Solar system experiments do not yet veto modified gravity models

2006; American Physical Society; Volume: 74; Issue: 2 Linguagem: Inglês

10.1103/physrevd.74.023529

1550-7998

Valerio Faraoni,

Noncommutative and Quantum Gravity Theories

The dynamical equivalence between modified and scalar-tensor gravity theories is revisited and it is concluded that it breaks down in the limit to general relativity. A gauge-independent analysis of cosmological perturbations in both classes of theories lends independent support to this conclusion. As a consequence, the PPN formalism of scalar-tensor gravity and Solar System experiments do not veto modified gravity, as previously thought.