Gluonic vacuum, q-theory, and the cosmological constant

Details Gluonic vacuum, q-theory, and the cosmological constant Gluonic vacuum, q-theory, and the cosmological constant

2008-11-26

arxiv.org/abs/0811.4347v6

Phys.Rev.D79:063527,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages; v6: published version

Scientific paper

10.1103/PhysRevD.79.063527

In previous work, q-theory was introduced to describe the gravitating macroscopic behavior of a conserved microscopic variable q. In this article, the gluon condensate of quantum chromodynamics is considered in terms of q-theory. The remnant vacuum energy density (i.e., cosmological constant) of an expanding universe is estimated as K_{QCD}^3 / E_{Planck}^2, with string tension K_{QCD} \approx (10^2 MeV)^2 and gravitational scale E_{Planck} \approx 10^{19} GeV. The only input for this estimate is general relativity, quantum chromodynamics, and the Hubble expansion of the present Universe.

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