Constraining $f(T)$ Theories with the Varying Gravitational Constant
General Relativity and Quantum Cosmology
2012-08-31 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
As is well known, a varying effective gravitational "constant" is one of the common features of most modified gravity theories. Of course, as a modified gravity theory, theory is not an exception. Noting that the observational constraint on the varying gravitational "constant" is very tight, in the present work we try to constrain theories with the varying gravitational "constant". We find that the allowed model parameter or has been significantly shrunk to a very narrow range around zero. In fact, the results improve the previous constraints by an order of magnitude.
Keywords
Cite
@article{arxiv.1108.0859,
title = {Constraining $f(T)$ Theories with the Varying Gravitational Constant},
author = {Hao Wei and Hao-Yu Qi and Xiao-Peng Ma},
journal= {arXiv preprint arXiv:1108.0859},
year = {2012}
}
Comments
10 pages, 2 tables, 2 figures, revtex4; v2: discussions added, Eur. Phys. J. C in press; v3: published version. arXiv admin note: text overlap with arXiv:1106.0102