Rev. Mod. Phys. 61, 1–23 (1989)The cosmological constant problem
Astronomical observations indicate that the cosmological constant is many orders of magnitude smaller than estimated in modern theories of elementary particles. After a brief review of the history of this problem, five different approaches to its solution are described. © 1988 The American Physical Society URL:
http://link.aps.org/doi/10.1103/RevModPhys.61.1
DOI:
10.1103/RevModPhys.61.1
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