Constraining $f(T)$ Theories with the Varying Gravitational Constant

Autor:	Wei, Hao, Qi, Hao-Yu, Ma, Xiao-Peng
Rok vydání:	2011
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Extragalactic Astrophysics High Energy Physics - Theory
Zdroj:	Eur.Phys.J.C72:2117,2012
Druh dokumentu:	Working Paper
DOI:	10.1140/epjc/s10052-012-2117-8
Popis:	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, $f(T)$ 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 $f(T)$ theories with the varying gravitational "constant". We find that the allowed model parameter $n$ or $\beta$ has been significantly shrunk to a very narrow range around zero. In fact, the results improve the previous constraints by an order of magnitude. Comment: 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
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1108.0859 Zobrazit plný text záznamu View this record from Arxiv