Cosmology and the Standard Model

Details Cosmology and the Standard Model Cosmology and the Standard Model

2002-10-22

arxiv.org/abs/hep-th/0210202v1

Phys.Rev. D67 (2003) 043508

Physics

High Energy Physics

High Energy Physics - Theory

49 pages

Scientific paper

10.1103/PhysRevD.67.043508

We consider the properties of an ensemble of universes as function of size, where size is defined in terms of the asymptotic value of the Hubble constant (or, equivalently, the value of the cosmological constant). We assume that standard model parameters depend upon size in a manner that we have previously suggested, and provide additional motivation for that choice. Given these assumptions, it follows that universes with different sizes will have different physical properties, and we estimate, very roughly, that only if a universe has a size within a factor of a square root of two or so of our own will it support life as we know it. We discuss implications of this picture for some of the basic problems of cosmology and particle physics, as well as the difficulties this point of view creates.

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