Cosmological and astrophysical tests of quantum gravity
| dc.creator | Periwal, Vipul | |
| dc.date | 1999-06-15 | |
| dc.date | 1999-06-21 | |
| dc.date.accessioned | 2026-07-07T02:32:02Z | |
| dc.date.available | 2026-07-07T02:32:02Z | |
| dc.description | Physics in the vicinity of an ultraviolet stable fixed point of a quantum field theory is parametrized by a renormalization group invariant macroscopic length scale, the correlation length $ξ,$ with the quantum effective action a function of this length scale. Numerical simulations of quantum gravity suggest the existence of just such a fixed point. Since the quantum effective action is a function only of $ξ,$ the cosmological constant must be $k ξ^{-2}$ with $k$ a pure number. Higher derivative terms are also parametrized by this length scale, so in particular the effective Newtonian dynamics of a test particle is modified at acceleration scales of order $1/ξ.$ Thus, renormalization group effects in quantum gravity provide a natural link between the phenomenological acceleration scale associated with galactic rotation curves and the value of the cosmological constant favoured by recent supernovae observations. | |
| dc.description | 6 pages, RevTeX; references and comments added | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9906253 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9906253 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14369 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Cosmological and astrophysical tests of quantum gravity | |
| dc.type | text |