The Cosmological Constant Problem
@article{Weinberg1989TheCC, title={The Cosmological Constant Problem}, author={Steven Weinberg}, journal={Reviews of Modern Physics}, year={1989}, volume={61}, pages={1-23} }
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.
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