A common problem for scalar field models of dark energy is to explain why the fifth forces mediated by the new scalar field are unobservable in current experiments. In the chameleon model of dark energy this problem is avoided when the scalar field is allowed to have a mass dependent on the properties of its environment. I will discuss how the chameleon couples to the fields of the standard model, and then show that these couplings allow for new possibilities for detecting dark energy in particle colliders. I focus on the contributions of dark energy to electroweak precision observables, and Higgs production at the LHC.

DESY Hamburg