On the Stability of Non-Abelian Semi-local Vortices

Details On the Stability of Non-Abelian Semi-local Vortices On the Stability of Non-Abelian Semi-local Vortices

2008-10-31

arxiv.org/abs/0810.5679v3

Nucl.Phys.B813:484-502,2009

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX 19 pages, 9 figures; v2: comments added in Section 2.3; v3: reference added

Scientific paper

10.1016/j.nuclphysb.2008.12.024

We study the stability of non-Abelian semi-local vortices based on an N=2 supersymmetric H = [SU(Nc) x U(1)]/Z_Nc = U(Nc) gauge theory with an arbitrary number of flavors (Nf > Nc) in the fundamental representation, when certain N=1 mass terms are present, making the vortex solutions no longer BPS-saturated. Local (ANO-like) vortices are found to be stable against fluctuations in the transverse directions. Strong evidence is found that the ANO-like vortices are actually the true minima. In other words, the semi-local moduli, which are present in the BPS limit, disappear in our non-BPS system, leaving the vortex with the orientational moduli CP(Nc-1) only. We discuss the implications of this fact on the system in which the U(Nc) model arises as the low-energy approximation of an underlying e.g. G = SU(Nc+1) gauge theory.

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