Abstract
We discuss the cosmological abundance of magnetic monopoles in locally supersymmetric GUTs and primordial inflation. Depending on the temperature scale of the GUT phase transition (Λ5 in this model) monopoles may or may not be suppressed sufficiently to satisfy cosmological and astrophysical limits. For example, if the GUT transition occurs after inflation (Λ5 < TH ∼ 0 (1010− 1011 GeV), where TH is the temperature at which inflation occurs) too many monopoles will be produced unless Λ5 < 109 GeV. Even then, although the cosmological density limits are satisfied, neutron star limits on the monopole abundance may rule this situation out. If on the other hand Λ5 > TH, SU(5) breaking may occur during inflation and hence the monopole abundance is greatly suppressed as it was in non-primordial inflation. We show that both scenarios are possible with the latter (Λ5 > TH) being preferred for monopole suppression.KeywordsHubble ParameterGrand Unify TheoryMagnetic MonopoleSupersymmetry Breaking ScaleGalactic Magnetic FieldThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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