Covariant renormalizable gravity and its FRW cosmology

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.043001· OSTI ID:21409248

Nojiri, Shin'ichi ^[1]; Odintsov, Sergei D ^[2]

---

1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
2. Institucio Catalana de Recerca i Estudis Avancats (ICREA) and Institut de Ciencies de l'Espai (IEEC-CSIC), Campus UAB, Facultat de Ciencies, Torre C5-Par-2a pl, E-08193 Bellaterra, Barcelona (Spain)

We consider the diffeomorphism invariant gravity coupled with the ideal fluid in the nonstandard way. The Lorentz invariance of the graviton propagator in such a theory considered as perturbation over flat background turns out to be broken due to the nonstandard coupling with the ideal fluid. As a result the behavior of the propagator in the ultraviolet/infrared region indicates that some versions of such theory are (super-)renormalizable ones (with appearance of only physical transverse modes). The Friedmann-Robertson-Walker cosmology in some cases may be different from the one in general relativity with the possible power law inflationary stage.

• OSTI ID: 21409248
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS
COSMOLOGY
COUPLING
DISTURBANCES
ELECTROMAGNETIC RADIATION
FIELD THEORIES
FLUID FLOW
GENERAL RELATIVITY THEORY
GRAVITATION
IDEAL FLOW
INCOMPRESSIBLE FLOW
INVARIANCE PRINCIPLES
LORENTZ INVARIANCE
PERTURBATION THEORY
PROPAGATOR
RADIATIONS
RELATIVITY THEORY
STEADY FLOW
ULTRAVIOLET RADIATION