Cosmological consequences of scalar mesons from gauge/gravity correspondence

Details Cosmological consequences of scalar mesons from gauge/gravity correspondence Cosmological consequences of scalar mesons from gauge/gravity correspondence

2007-11-15

arxiv.org/abs/0711.2311v1

Nuovo Cim.B124:525-538,2009

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 9 figures

Scientific paper

10.1393/ncb/i2009-10789-3

We consider the spectrum of mesons for the gauge theory dual to a supergravity configuration of intersecting D3/D7 branes, and use the expression for the Lagrangian of the scalar mesons to compute explicitly the Lagrangian for the lightest states in the infrared limit. Assuming that the matter content of this gauge theory is part of a hidden sector, which interacts with the standard model only via gravity, we explore the cosmological consequences of these lightest scalar mesons for a FRW universe. We show that phantom fields may appear naturally in this kind of scenarios.

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