Topology in the Little Higgs Models

Details Topology in the Little Higgs Models Topology in the Little Higgs Models

2004-04-12

arxiv.org/abs/hep-ph/0404105v1

Phys.Rev. D70 (2004) 065008

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures

Scientific paper

10.1103/PhysRevD.70.065008

We investigate the implications of the nontrivial vacuum structure of little Higgs models. In particular, focusing on the littlest Higgs model, we demonstrate the existence of three types of topological defects. One is a global cosmic string that is truly topological. The second is more subtle; a semilocal cosmic string, which may be stable due to dynamical effects. The final defect is a $Z_2$ monopole solution with an unusual structure. We briefly discuss the possible cosmological consequences of such nonperturbative structures, although we note that these depend crucially on the fermionic content of the models.

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