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2008-02-10 - Article/Dans un journal avec peer-review - Anglais - 17 page(s)

Brihaye Yves , Honorez L., "Twisted semilocal strings in the MSSM" in International Journal of Modern Physics A : Particles & Fields, Gravitation, Cosmology, Nuclear Physics, 23, 3-4, 581-597

  • Edition : World Scientific Publishing Company, Singapore (Singapore)
  • Codes CREF : Physique des particules élémentaires (DI1221), Physique théorique et mathématique (DI1210)
  • Unités de recherche UMONS : Physique théorique et mathématique (S814)
Texte intégral :

Abstract(s) :

(Anglais) The standard electroweak model is extended by means of a second Brout-Englert-Higgs-doublet. The symmetry breaking potential is chosen is such a way that (i) the Lagrangian possesses a custodial symmetry, (ii) a stationary, axially symmetric ansatz of the bosonic fields consistently reduces the Euler-Lagrange equations to a set of differential equations. The potential involves, in particular, a direct interaction between the two doublets. Stationary, axially-symmetric solutions of the classical equations are constructed. Some of them can be assimilated to embedded Nielsen-Olesen strings. From these solutions there are bifurcations and new solutions appear which exhibit the characteristics of the recently constructed twisted semilocal strings. A special emphasis is set on "doubly-twisted" solutions for which the two doublets present different time-dependent phase factors. They are regular and have a finite energy which can be lower than the energy of the embedded twisted solution. Electric-type solutions, such that the fields oscillate asymptotically far from the symmetry-axis, are also reported.

Notes :
  • (Anglais) e-print: hep-th/0701141
Identifiants :
  • DOI : 10.1142/S0217751X08038469