Symmetry nonrestoration at high temperature and the monopole problem
Abstract
We show that there exists a range of parameters in SU(5) theory for which the grand unified theory symmetry remains broken at high temperature, thus avoiding the phase transition that gives rise to the overproduction of monopoles. The thermal production of monopoles can be naturally suppressed, keeping their number density below the cosmological limits.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1995
- DOI:
- 10.1103/PhysRevLett.75.4559
- arXiv:
- arXiv:hep-ph/9507230
- Bibcode:
- 1995PhRvL..75.4559D
- Keywords:
-
- 11.30.Qc;
- 12.10.Dm;
- 14.80.Hv;
- 98.80.Cq;
- Spontaneous and radiative symmetry breaking;
- Unified theories and models of strong and electroweak interactions;
- Magnetic monopoles;
- Particle-theory and field-theory models of the early Universe;
- High Energy Physics - Phenomenology;
- Astrophysics
- E-Print:
- Latex, 12 pages, revised version as appeared in Physical Review Letters. Minor corrections, comments and two references added