Quintessence with two energy scales - art. no. 083505

Citation
P. Brax et al., Quintessence with two energy scales - art. no. 083505, PHYS REV D, 6408(8), 2001, pp. 3505
Citations number
42
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6408
Issue
8
Year of publication
2001
Database
ISI
SICI code
0556-2821(20011015)6408:8<3505:QWTES->2.0.ZU;2-I
Abstract
We study quintessence models using low energy supergravity inspired from st ring theory. We consider effective supergravity with two scales m(S), the s tring scale, and m(Pl), the Planck scale, and show that quintessence natura lly arises from a supersymmetry breaking hidden sector. As long as supersym metry is broken by the F-term of a Polonyi-like field coupled to the quinte ssence field in the Kahler potential we find that the Ratra-Peebles potenti al and its supergravity version are generic predictions. This requires that the string scale decouples from the Planck scale, m(s)<<m(Pl). In the cont ext of supergravity, the potential possesses a minimum induced by the super gravity corrections to the Ratra-Peebles potential at low redshifts. We stu dy the physical consequences of the presence of this minimum.