1210.7804 (Amol Upadhye)

Symmetron dark energy in laboratory experiments    [PDF]

Amol Upadhye

The symmetron scalar field is a matter-coupled dark energy candidate which effectively decouples from matter in high-density regions through a symmetry restoration. We consider a previously unexplored regime, in which the vacuum mass $\mu \sim 10^{-3}$ eV of the symmetron is near the dark energy scale, and the matter coupling parameter $M \sim 1$ TeV is just beyond Standard Model energies. Such a field will give rise to a fifth force at submillimeter distances which can be probed by short-range gravity experiments. We show that a torsion pendulum experiment such as E\"ot-Wash can exclude symmetrons in this regime for all self-couplings $\lambda \lesssim 1$.

View original: http://arxiv.org/abs/1210.7804