Constraining f(R) gravity as a scalar-tensor theory

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.063505· OSTI ID:21027755

Faulkner, Thomas; Yi, Mao ^[1]; Tegmark, Max ^[1]; Bunn, Emory F ^[2]

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1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Physics Department, University of Richmond, Richmond, Virginia 23173 (United States)

We search for viable f(R) theories of gravity, making use of the equivalence between such theories and scalar-tensor gravity. We find that models can be made consistent with solar system constraints either by giving the scalar a high mass or by exploiting the so-called chameleon effect. However, in both cases, it appears likely that any late-time cosmic acceleration will be observationally indistinguishable from acceleration caused by a cosmological constant. We also explore further observational constraints from, e.g., big bang nucleosynthesis and inflation.

• OSTI ID: 21027755
• Journal Information: Physical Review. D, Particles Fields, Vol. 76, Issue 6; Other Information: DOI: 10.1103/PhysRevD.76.063505; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATION
COSMOLOGICAL CONSTANT
GRAVITATION
INFLATIONARY UNIVERSE
MASS
NUCLEOSYNTHESIS
SCALARS
SOLAR SYSTEM
TENSORS