How Old is the Universe?

Abstract

A dynamical model of the decaying vacuum energy is presented, which is based on Jordan-Brans-Dicke theory with a scalar field $\varphi$. The solution of an evolutionary differential equation for the scalar field $\varphi$ drives the vacuum energy towards a cosmological constant at the present epoch that can give for the age of the universe, $t_0\sim 13.5$ Gyr for ${\Omega }_0=1$, which is consistent with the age of globular clusters.

13 pages, PlainTeX Macro included

References in corpus (2)

• Curvature and Flatness in a Brans-Dicke Universe
• A Possible Solution to the Horizon Problem: The Mad Era for Massless Scalar Theories of Gravity

Cited by in corpus (8)

• The Case for a Positive Cosmological Lambda-term
• Evolution of the Scale Factor with a Variable Cosmological Term
• General Scalar Fields as Quintessence
• Nucleosynthesis bounds on a time-varying cosmological 'constant'
• Coasting cosmologies with time dependent cosmological constant
• Cosmological applications in Kaluza-Klein theory
• Dynamics of a Generalized Cosmological Scalar-Tensor Theory
• Hamiltonian study of the Generalized scalar-tensor theory with potential in a Bianchi type I model