1999/12/01 by Philippe Brax, Jerome Martin
Physics and Astronomy · #astro-ph #gr-qc #hep-ph #hep-th
published as Annalen Phys. 11 (2000) 507-510 · 4 pages, 2 figures, presented at the Journees Relativistes 99, Weimar, September 12-17, 1999
arxiv created 1999/12/01 · arxiv updated 2009/11/30
It is demonstrated that any realistic model of quintessence should be based on Supergravity since, when the scalar field is on tracks today, Q≈ m\rm Pl. This improves the agreement between theoretical predictions and the current observations. In particular, a generic property is that ratio ω\rm Q≡ p\rm Q/ρ\rm Q is pushed towards -1. A string-inspired model is proposed where the potential is given by V(Q)= \fracΛ4+αQαe^\fracκ2Q2. The model predicts ω\rm Q≈ -0.82, a value less that one sigma from the current likehood value.