Matter Power Spectrum in f(R) Gravity with Massive Neutrinos

The effect of massive neutrinos on matter power spectrum is discussed in the context of f(R) gravity. It is shown that the anomalous growth of density fluctuations on small scales due to the scalaron force can be compensated by the free streaming of neutrinos. As a result, models that predict observ...

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Bibliographic Details
Published in:Progress of theoretical and experimental physics 2010-09, Vol.124 (3), p.541-546
Main Authors: Motohashi, Hayato, Starobinsky, Alexei A., Yokoyama, Jun'ichi
Format: Article
Language:English
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Summary:The effect of massive neutrinos on matter power spectrum is discussed in the context of f(R) gravity. It is shown that the anomalous growth of density fluctuations on small scales due to the scalaron force can be compensated by the free streaming of neutrinos. As a result, models that predict observable deviation of the equation-of-state parameter w DE from w DE = −1 can be reconciled with observations of matter clustering if the total neutrino mass is O (0.5 eV).
ISSN:0033-068X
2050-3911
1347-4081
DOI:10.1143/PTP.124.541