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THE GROWTH OF MATTER PERTURBATIONS IN f(T) GRAVITY

XIANGYUN FU

Institute of Physics, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P. R. China

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PUXUN WU

Center for Nonlinear Science and Department of Physics, Ningbo University, Ningbo, Zhejiang 315211, P. R. China

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, and

HONGWEI YU

Department of Physics and Key Laboratory of Low Dimensional, Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, Hunan 410081, P. R. China

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https://doi.org/10.1142/S0218271811019372Cited by:13 (Source: Crossref)

Abstract

In this paper, we study the growth index of matter density perturbations for the power law model in f(T) gravity. Using the parametrization γ(z) = γ₀ + γ₁(z/1 + z) for the growth index, which approximates the real evolution of γ(z) very well, and the observational data of the growth factor, we find that, at the 1σ confidence level, the power law model in f(T) gravity is consistent with the observations, since the obtained theoretical values of γ₀ and γ₁ are in the allowed region.

Keywords:

PACS: 95.36.+x, 98.80.Es

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