Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-06
JCAP 0501:012,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 34 pages, 2 eps figures. Discussion enlarged, references added. Final version accepted in JCAP
Scientific paper
10.1088/1475-7516/2005/01/012
The renormalization group (RG) approach to cosmology is an efficient method to study the possible evolution of the cosmological parameters from the point of view of quantum field theory in curved space-time. In this work we continue our previous investigations of the RG method based on potential low-energy effects induced from physics at very high energy scales M_X near M_P. In the present instance we assume that both the Newton constant, G, and the cosmological term, \Lambda, can be functions of a scale parameter \mu. It turns out that G(\mu) evolves according to a logarithmic law which may lead to asymptotic freedom of gravity, similar to the gauge coupling in QCD. At the same time \Lambda(\mu) evolves quadratically with \mu. We study the consistency and cosmological consequences of these laws when \mu=H. Furthermore, we propose to extend this method to the astrophysical domain after identifying the local RG scale at the galactic level. It turns out that Kepler's third law of celestial mechanics receives quantum corrections that may help to explain the flat rotation curves of the galaxies without introducing the dark matter hypothesis. The origin of these effects (cosmological and astrophysical) could be linked, in our framework, to physics at M_X= 10^{16-17} GeV.
Shapiro Ilya L.
Sola Joan
Stefancic Hrvoje
No associations
LandOfFree
Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-216271