Peer-Reviewed Journal Details
Mandatory Fields
Dolan B.;Szabo R.
Journal of High Energy Physics
Dimensional reduction, monopoles and dynamical symmetry breaking
Optional Fields
Large extra dimensions Space-time symmetries Spontaneous symmetry breaking
We consider SU(2)-equivariant dimensional reduction of Yang-Mills-Dirac theory on manifolds of the form M × P 1, with emphasis on the effects of non-trivial magnetic flux on P 1. The reduction of Yang-Mills fields gives a chain of coupled Yang-Mills-Higgs systems on M with a Higgs potential leading to dynamical symmetry breaking, as a consequence of the monopole fields. The reduction of SU(2)-symmetric fermions gives massless Dirac fermions on M transforming under the low-energy gauge group with Yukawa couplings, again as a result of the internal U(1) fluxes. The tower of massive fermionic Kaluza-Klein states also has Yukawa interactions and admits a natural SU(2)-equivariant truncation by replacing P 1 with a fuzzy sphere. In this approach it is possible to obtain exactly massless chiral fermions in the effective field theory with Yukawa interactions, without any further requirements. We work out the spontaneous symmetry breaking patterns and determine the complete physical particle spectrum in a number of explicit examples. © 2009 SISSA.
Grant Details