Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725725 | Physics Letters B | 2010 | 5 Pages |
Abstract
The problem of cosmological particle creation for a spatially flat, homogeneous and isotropic universes is discussed in the context of f(R) theories of gravity. Different from cosmological models based on general relativity theory, it is found that a conformal invariant metric does not forbid the creation of massless particles during the early stages (radiation era) of the universe.
Keywords
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
S.H. Pereira, C.H.G. Bessa, J.A.S. Lima,