Possible origins of a small, nonzero cosmological constant

Details Possible origins of a small, nonzero cosmological constant Possible origins of a small, nonzero cosmological constant

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phlb..197...42w&link_type=abstract

Physics Letters B, Volume 197, Issue 1-2, p. 42-44.

Physics

45

Scientific paper

The idea that the cosmological constant Λ may have a small, nonzero value (Λ ~ (10-33 eV)2) has been recently revived in attempts to understand several cosmological issues. Despite the fact that such a small, nonzero Λ is aesthetically unappealing the issue of its existence will eventually be decided by experiments. In this paper the implications to particle physics of the existence of such a small, nonzero value of Λ are examined. Models are described in which the ground state of the system is assumed to have a cosmological constant equal to zero but in which we are not, presently in this ground state. The possibility that this deviation from the ground state leads to such a small, effective cosmological constant is studied.
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