Viability of f(R) theories with additional powers of curvature

Anthony W. Brookfield, Carsten van de Bruck, and Lisa M. H. Hall
Phys. Rev. D 74, 064028 – Published 28 September 2006

Abstract

We consider a modified gravity theory, f(R)=Ra/Rn+bRm, in the metric formulation, which has been suggested to produce late-time acceleration in the Universe, while satisfying local fifth-force constraints. We investigate the parameter range for this theory, considering the regimes of early and late-time acceleration, big bang nucleosynthesis, and fifth-force constraints. We conclude that it is difficult to find a unique range of parameters for consistency of this theory.

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  • Received 3 August 2006

DOI:https://doi.org/10.1103/PhysRevD.74.064028

©2006 American Physical Society

Authors & Affiliations

Anthony W. Brookfield1,2,*, Carsten van de Bruck1,†, and Lisa M. H. Hall1,‡

  • 1Astroparticle Theory and Cosmology Group, Department of Applied Mathematics, The University of Sheffield, Hounsfield Road, Sheffield S3 7RH, United Kingdom
  • 2Astroparticle Theory and Cosmology Group, Department of Physics and Astronomy, The University of Sheffield, Hounsfield Road, Sheffield S3 7RH, United Kingdom

  • *Electronic address: php04awb@sheffield.ac.uk
  • Electronic address: C.vandeBruck@sheffield.ac.uk
  • Electronic address: Lisa.Hall@sheffield.ac.uk

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Issue

Vol. 74, Iss. 6 — 15 September 2006

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