Mechanism for a Decaying Cosmological Constant

Details Mechanism for a Decaying Cosmological Constant Mechanism for a Decaying Cosmological Constant

2001-09-26

arxiv.org/abs/gr-qc/0109087v1

Class.Quant.Grav. 19 (2002) 2369-2374

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, no figure

Scientific paper

10.1088/0264-9381/19/9/303

A mechanism is introduced to reduce a large cosmological constant to a sufficiently small value consistent with observational upper limit. The basic ingradient in this mechanism is a distinction which has been made between the two unit systems used on cosmology and particle physics. We have used a conformal invariant gravitational model to define a particular conformal frame in terms of the large scale properties of the universe. It is then argued that the contributions of mass scales in particle physics to the vacuum energy density should be considered in a different conformal frame. In this manner a cancellation mechanism is presented in which the conformal factor plays a key role to relax the large effective cosmological constant.

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