Blas, D.Pujolas, O.Sibiryakov, S.2011-12-162011-12-162011-12-16201010.1016/j.physletb.2010.03.073https://infoscience.epfl.ch/handle/20.500.14299/75465WOS:000278242600020We 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. (c) 2010 Elsevier B.V. All rights reserved.Quantum gravityQuantum field theoryHorava gravityLifshitz-type theoriestext::journal::journal article::research article