How successful can the scalar-tensor theory be in understanding the accelerating universe?
arXiv:0908.4324
Abstract
The accelerating universe is closely related to today's version of the cosmological constant problem; fine-tuning and coincidence problems. We show how successfully the scalar-tensor theory, a rather rigid theoretical idea, provides us with a simple and natural way to understand why today's observed cosmological constant is small only because we are old cosmologically, without fine-tuning theoretical parameters extremely.
6 pages, 1 figure, based on a conference talk