Phys. Rev. Lett. 80, 1822–1825 (1998)Anthropic Considerations in Multiple-Domain Theories and the Scale of Electroweak Symmetry BreakingReceived 2 October 1997; published in the issue dated 2 March 1998 One of the puzzles of the standard model is why the mass parameter μ2, which determines the weak interaction scale, is closer to the quantum chromodynamics scale than to the grand unification or Planck scales. We consider a novel approach to this problem, based upon the idea that μ2 takes different values in different domains of the Universe. The whole range of values for μ2, from +MP2 to -MP2, is explored, and it is found that only for values in a narrow window is life likely to be possible. The observed value of μ2 is fairly typical of the values in this window. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.1822
DOI:
10.1103/PhysRevLett.80.1822
PACS:
12.15.-y, 98.80.Bp, 98.80.Cq
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