Natural Quintessence?

Details Natural Quintessence? Natural Quintessence?

2000-08-18

arxiv.org/abs/hep-ph/0008205v2

Phys.Lett.B497:281-288,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages LaTeX, 3 figures included, numerical correction

Scientific paper

10.1016/S0370-2693(00)01339-3

We formulate conditions for the naturalness of cosmological quintessence scenarios. The quintessence lagrangian is taken to be the sum of a simple exponential potential and a non-canonical kinetic term. This parameterization covers most variants of quintessence and makes the naturalness conditions particularly transparent. Several ``natural'' scalar models lead, for the present cosmological era, to a large fraction of homogeneous dark energy density and an acceleration of the scale factor as suggested by observation.

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