2002/10/29 by Jihn E. Kim, Hans Peter Nilles · 1 citation
Physics and Astronomy · #hep-ph #astro-ph #hep-th
paper · pdf · doi:10.1016/s0370-2693(02)03148-9
published as Phys.Lett.B553:1-6,2003 · 11 pages, Revtex, 1 figure
arxiv created 2002/10/29 · arxiv updated 2014/11/17
The model independent axion of string theory has a decay constant of order of the Planck scale. We explore the properties of this quintessence candidate (quintaxion) in the scheme of hidden sector supergravity breakdown. In models allowing for a reasonable μ term, the hidden sector dynamics may lead to an almost flat potential responsible for the vacuum energy of (0.003 \rm eV)4. A solution to the strong CP-problem is provided by an additional hidden sector pseudoscalar (QCD axion) with properties that make it an acceptable candidate for cold dark matter of the universe.