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On existence of a possible Lorentz invariant modified gravity in Weitzenb\"{o}ck spacetime

General Physics 2017-10-20 v1

Abstract

Modified gravity which was constructed by torsion scalar TT, namely f(T)f(T) doesn't respect Lorentz symmetry. As an attempt to make a new torsion based modified gravity with Lorentz invarianve, recently f(T,B)f(T,\mathcal{B}) introduced where B=2μTμB=2\nabla_{\mu}T^{\mu} \citep{Bahamonde:2015zma}. We would argue, even when all is constructed and done in a self-consistent form, if you handle them properly,we observe that there is no Lorentz invariant teleparallel equivalent of f(R)f(R) gravity. All we found is that the f(R)f(R) gravity in which RR must be computed in Weitzenb\"{o}ck spacetime, using Weitzenb\"{o}ck's connection, nor Levi-Civita connections is the only possible Lorentz invariant type of modified gravity. Consequently, f(T)f(T) gravity can not obey Lorentz symmetry not only in its orthodoxica form but even in this new framework f(T,B)f(T,\mathcal{B}).

Keywords

Cite

@article{arxiv.1511.01205,
  title  = {On existence of a possible Lorentz invariant modified gravity in Weitzenb\"{o}ck spacetime},
  author = {Davood Momeni and Ratbay Myrzakulov},
  journal= {arXiv preprint arXiv:1511.01205},
  year   = {2017}
}

Comments

http://link.springer.com/article/10.1007%2Fs10509-015-2546-6