Abstract
Grand unified models of elementary particle interactions contain stable superheavy magnetic monopoles. The density of such monopoles in the early universe is estimated to be unacceptably large. Cosmological monopole production may be suppressed if the phase transition at the grand unification mass scale is strongly first order.
- Received 21 June 1979
DOI:https://doi.org/10.1103/PhysRevLett.43.1365
©1979 American Physical Society
