How successful can the scalar-tensor theory be in understanding the accelerating universe?

Details How successful can the scalar-tensor theory be in understanding the accelerating universe? How successful can the scalar-tensor theory be in understanding the accelerating universe?

2009-08-29

arxiv.org/abs/0908.4324v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 1 figure, based on a conference talk

Scientific paper

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.

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