Quintessence with two energy scales

Details Quintessence with two energy scales Quintessence with two energy scales

2001-04-24

arxiv.org/abs/hep-ph/0104240v2

Phys.Rev.D64:083505,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 9 figures, minor changes matching published version. Accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.64.083505

We study quintessence models using low energy supergravity inspired from string theory. We consider effective supergravity with two scales m_S, the string scale, and m_PL, the Planck scale and show that quintessence naturally arises from a supersymmetry breaking hidden sector. As long as supersymmetry is broken by the $F$-term of a Polonyi-like field coupled to the quintessence field in the K\"ahler potential we find that the Ratra-Peebles potential and its supergravity version are generic predictions. This requires that the string scale decouples from the Planck scale, m_S << m_PL. In the context of supergravity, the potential possesses a minimum induced by the supergravity corrections to the Ratra-Peebles potential at low redshifts. We study the physical consequences of the presence of this minimum.

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