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We consider a benchmark bulk theory in four-dimensions: N = 2 supersymmetric QCD with the gauge group U(N) and Nf flavors of fundamental matter hypermultiplets (quarks). The nature of the BPS strings in this benchmark theory crucially depends on Nf . If Nf ≥ N and all quark masses are equal, it supports non-Abelian BPS strings which have internal… (More)

- Alexei Yung
- 2003

This paper could have been entitled “D branes and strings from flesh and blood.” We study field theoretic prototypes of D branes/strings. To this end we consider (2+1)-dimensional domain walls in (3+1)-dimensional N = 2 SQCD with SU(2) gauge group and Nf = 2 flavors of fundamental hypermultiplets (quarks). This theory is perturbed by a small mass term of… (More)

Composite non-Abelian vortices in N = 2 supersymmetric U(2) SQCD are investigated. The internal moduli space of an elementary non-Abelian vortex is CP. In this paper we find a composite state of two coincident non-Abelian vortices explicitly solving the first order BPS equations. Topology of the internal moduli space T is determined in terms of a discrete… (More)

We consider non-Abelian 1/2 BPS flux tubes (strings) in a deformed N = 2 supersymmetric gauge theory, with mass terms μ1,2 of the adjoint fields breaking N = 2 down to N = 1. The main feature of the non-Abelian strings is the occurrence of orientational moduli associated with the possibility of rotations of their color fluxes inside a global SU(N) group.… (More)

- Alexei Yung
- 1990

The N=2 supersymmetric gauge theory with gauge group SU(2) is considered. The instanton field is calculated explicitly using the superfield formalism. The instanton-induced effects are encoded in the effective vertex in the Lagrangian. This vertex produces the large distance expansion of the low energy effective Lagrangian in derivatives of fields. The… (More)

Building on our previous results (Ref. [4]), we study D-brane/string prototypes in weakly coupled (3+1)-dimensional supersymmetric field theory engineered to support (2+1)-dimensional domain walls, " non-Abelian " strings and various junctions. Our main but not exclusive task is the study of localization of non-Abelian gauge fields on the walls. The model… (More)

We continue explorations of non-Abelian strings, focusing on the solution of a heterotic deformation of the CP (N − 1) model with an extra right-handed fermion field and N = (0, 2) supersymmetry. This model emerges as a lowenergy theory on the worldsheet of the BPS-saturated flux tubes (strings) in N = 2 supersymmetric QCD deformed by a superpotential of a… (More)

We consider non-Abelian BPS-saturated flux tubes (strings) inN = 2 supersymmetric QCD deformed by superpotential terms of a special type breaking N = 2 supersymmetry down to N = 1 . Previously it was believed that worldsheet supersymmetry is “accidentally” enhanced due to the facts that N = (1, 1) SUSY is automatically elevated up to N = (2, 2) on CP (N −… (More)

- Alexei Yung
- 2008

The confinement scenario in N = 2 supersymmetric gauge theory at the monopole point is reviewed. Basic features of this U(1) confinement are contrasted with those we expect in QCD. In particular, extra states in the hadron spectrum and non-linear Regge trajectories are discussed. Then another confinement scenario arising on Higgs branches of the theory with… (More)

We study the confinement scenario in N=2 supersymmetric SU(2) gauge theory near the monopole point upon breaking of N=2 supersymmetry by the adjoint matter mass term. We confirm claims made previously that the Abrikosov–Nielsen–Olesen string near the monopole point fails to be a BPS state once next-to-leading corrections in the adjoint mass parameter taken… (More)