Brane realization of Nambu monopoles and electroweak strings

Minoru Eto, Kenichi Konishi, Muneto Nitta, Yutaka Ookouchi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the standard model, the electroweak Z string can end on a Nambu monopole, whose mass is calculated to be 689 GeV from the current precise experimental data assuming the new particle with mass 125 GeV to be the Higgs boson. We study an extension of the standard model with additional singlet and triplet Higgs fields in the framework of N=1 supersymmetric field theory by using a D-brane configuration in type IIA string theory. We construct a D-brane configuration describing the electroweak symmetry breaking, and find a single D2-brane configuration describing a Z string and a Nambu monopole attached by a Z string in the standard model without an adjoint Higgs field. We further find a single D2-brane configuration describing a composite of a 't Hooft-Polyakov monopole and a Nambu monopole attached by a Z string in an extended standard model with an adjoint Higgs field. We compute the binding energy of the 't Hooft-Polyakov and Nambu monopoles by solving a minimal surface area of a D2-brane.

Original languageEnglish
Article number045006
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number4
DOIs
Publication statusPublished - 2013 Feb 11

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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