Mechanism for a Decaying Cosmological Constant

TL;DR

The paper proposes a mechanism using conformal invariance to dynamically reduce a large cosmological constant to a value consistent with observations by considering different conformal frames for particle physics and cosmology.

Contribution

It introduces a novel conformal frame approach to cancel out large vacuum energy contributions, addressing the cosmological constant problem.

Findings

A conformal invariant gravitational model defines a frame for large-scale universe.

Different conformal frames are used for particle physics and cosmology.

The conformal factor enables a cancellation mechanism for the cosmological constant.

Abstract

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.