Moduli Fields as Quintessence and the Chameleon

Details Moduli Fields as Quintessence and the Chameleon Moduli Fields as Quintessence and the Chameleon

2006-12-19

arxiv.org/abs/hep-th/0612208v1

Phys.Lett.B647:320-329,2007

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 1 figure

Scientific paper

10.1016/j.physletb.2007.02.019

We consider models where moduli fields are not stabilized and play the role of quintessence. In order to evade gravitational tests, we investigate the possibility that moduli behave as chameleon fields. We find that, for realistic moduli superpotentials, the chameleon effect is not strong enough, implying that moduli quintessence models are gravitationally ruled out. More generally, we state a no-go theorem for quintessence in supergravity whereby models either behave like a pure cosmological constant or violate gravitational tests

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