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FOURTH-ORDER GRAVITY AND EXPERIMENTAL CONSTRAINTS ON EDDINGTON PARAMETERS

Dipartimento di Scienze Fisiche, Univ. di Napoli "Federico II", and INFN, Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Ed. N, via Cinthia, 80121, Napoli, Italy

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A. STABILE

Dipartimento di Fisica "E.R. Caianiello", Univ. di Salerno, and INFN, Sez. di Napoli, Gruppo Coll. di Salerno, via S. Allende, 84081 Baronissi (Salerno), Italy

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A. TROISI

Dipartimento di Scienze Fisiche, Univ. di Napoli "Federico II", and INFN, Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Ed. N, via Cinthia, 80121, Napoli, Italy

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https://doi.org/10.1142/S0217732306021633Cited by:64 (Source: Crossref)

Abstract

PPN-limit of alternative theories of gravity represents a still controversial matter of debate and no definitive answer has been provided, up to now, about this issue. By using the definition of the PPN-parameters γ and β in terms of f(R) theories of gravity, we show that a family of third-order polynomial theories, in the Ricci scalar R, turns out to be compatible with the PPN-limit and the deviation from General Relativity, theoretically predicted, can agree with experimental data.

Keywords:

PACS: 04.50.+h, 04.25.Nx, 98.80.-k

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