Working Paper Article Version 2 This version is not peer-reviewed

Cosmological Constant Decaying with CMB Temperature

Version 1 : Received: 26 April 2018 / Approved: 27 April 2018 / Online: 27 April 2018 (06:01:12 CEST)
Version 2 : Received: 13 June 2019 / Approved: 14 June 2019 / Online: 14 June 2019 (09:53:08 CEST)

A peer-reviewed article of this Preprint also exists.


Recent observations of the dark energy density have demonstrated the fine-tuning problem, and the challenges faced by theoretical modeling. In this study, we apply the self-similar symmetry (SSS) model, describing the hierarchical structure of the universe based on the Dirac large numbers hypothesis, to Einstein's cosmological term. We introduce a new similarity dimension, DB, in the SSS model. Using the DB SSS model, the cosmological constant Λ is simply expressed as a function of the cosmic microwave background (CMB) temperature. The result shows that both the gravitational constant G and Λ are coupled with the CMB temperature, which simplifies the solution of Einstein's field equations for the variable Λ-G model.


dark energy; dark matter; cosmic microwave background; large numbers hypothesis; varying fundamental constants; symmetry


Physical Sciences, Mathematical Physics

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