Inflation from extra dimensions

Journal Article · Mon Oct 04 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1301292· OSTI ID:21210556

Cline, James M ^[1]

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1. Physics Department, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8 (Canada)

The radial mode of n extra compact dimensions (the radion, b) can cause inflation in theories where the fundamental gravity scale, M, is smaller than the Planck scale M{sub P}. For radion potentials V(b) with a simple polynomial form, to get the observed density perturbations, the energy scale of V(b) must greatly exceed M{approx}1 TeV: V(b){sup 1/4}{identical_to}M{sub V}{approx}10{sup -4}M{sub P}. This gives a large radion mass and reheat temperature {approx}10{sup 9} GeV, thus avoiding the moduli problem. Such a value of M{sub V} can be consistent with the classical treatment if the new dimensions started sufficiently small. A new possibility is that b approaches its stable value from above during inflation. The same conclusions about M{sub V} may hold even if inflation is driven by matter fields rather than by the radion.

• OSTI ID: 21210556
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 488; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPACTIFICATION
COSMOLOGY
GEV RANGE
GRAND UNIFIED THEORY
GRAVITATION
GRAVITONS
INFLATIONARY UNIVERSE
PERTURBATION THEORY
POLYNOMIALS
POTENTIALS
SPACE-TIME
TEV RANGE