Covariant power-counting renormalizable gravity: Lorentz symmetry breaking and accelerating early-time FRW universe - High Energy Physics - TheoryReport as inadecuate




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Abstract: We continue the study of covariant power-counting renormalizable gravityconstrained by scalar Lagrange multiplier. Lorentz symmetry breaking isinvestigated in such a theory in comparison with the one in ghost condensationmodel. Covariant power-counting renormalizable vector gravity which isinvariant under $U1$ gauge symmetry is proposed. Several forms of vectorLagrange multiplier in this theory are discussed. It is shown that covariantscalar-vector gravity under consideration may have power-law or de Sitteraccelerating cosmological solution corresponding to inflationary era. Simplestblack hole solution is obtained and dispersion relations for graviton arepresented.



Author: Shin'ichi Nojiri, Sergei D. Odintsov

Source: https://arxiv.org/







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