Comment on `Strong coupling in extended Horava-Lifshitz gravity'

Details Comment on `Strong coupling in extended Horava-Lifshitz gravity' Comment on `Strong coupling in extended Horava-Lifshitz gravity'

2009-12-03

arxiv.org/abs/0912.0550v2

Phys.Lett.B688:350-355,2010

Physics

High Energy Physics

High Energy Physics - Theory

A footnote discussing the absence of fine-tuning is added

Scientific paper

10.1016/j.physletb.2010.03.073

We show that, contrary to the claim made in arXiv:0911.1299, the extended Horava gravity model proposed in arXiv:0909.3525 does not suffer from a strong coupling problem. By studying the observational constraints on the model we determine the bounds on the scale of the ultraviolet modification for which the proposal yields a phenomenologically viable, renormalizable and weakly coupled model of quantum gravity.

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