The Cosmological Constant is Back

Details The Cosmological Constant is Back The Cosmological Constant is Back

1995-04-03

arxiv.org/abs/astro-ph/9504003v1

Gen.Rel.Grav. 27 (1995) 1137-1144

Astronomy and Astrophysics

Astrophysics

latex, 8 pages plus one ps figure available as separate compressed uuencoded file

Scientific paper

10.1007/BF02108229

A diverse set of observations now compellingly suggest that Universe possesses a nonzero cosmological constant. In the context of quantum-field theory a cosmological constant corresponds to the energy density of the vacuum, and the wanted value for the cosmological constant corresponds to a very tiny vacuum energy density. We discuss future observational tests for a cosmological constant as well as the fundamental theoretical challenges---and opportunities---that this poses for particle physics and for extending our understanding of the evolution of the Universe back to the earliest moments.

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