Lattice study of monopoles in the Electroweak theory

B. L.G. Bakker, M. A. Zubkov, A. I. Veselov

Research output: Contribution to journalConference articlepeer-review


We investigated numerically properties of Nambu monopoles in lattice Electroweak theory at realistic values of α and θW . Our choice of parameters of lattice Lagrangian corresponds to large values of the Higgs boson mass MH > 2MW . We find that the density of Nambu monopoles cannot be predicted by the choice of the initial parameters of Electroweak theory and should be considered as the new external parameter of the theory. We also investigate the difference between the versions of Electroweak theory with the gauge groups SU (2) U (1) and SU (2) U (1)/Z2. We do not detect any difference at α ∼128 1 . However, such a difference appears in the strong coupling region and is related to the properties of monopoles constructed of the hypercharge field.

Original languageEnglish
Article number337
JournalProceedings of Science
StatePublished - 2007
Externally publishedYes
Event25th International Symposium on Lattice Field Theory, LATTICE 2007 - Regensburg, Germany
Duration: 30 Jul 20074 Aug 2007


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