Cosmological Constant and Axions in String Theory

Details Cosmological Constant and Axions in String Theory Cosmological Constant and Axions in String Theory

2006-07-13

arxiv.org/abs/hep-th/0607086v1

Physics

High Energy Physics

High Energy Physics - Theory

22 pages

Scientific paper

String theory axions appear to be promising candidates for explaining cosmological constant via quintessence. In this paper, we study conditions on the string compactifications under which axion quintessence can happen. For sufficiently large number of axions, cosmological constant can be accounted for as the potential energy of axions that have not yet relaxed to their minima. In compactifications that incorporate unified models of particle physics, the height of the axion potential can naturally fall close to the observed value of cosmological constant.

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