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D-branes in asymmetrically gauged WZW models and axial-vector duality | | Mark A. Walton
; Jian-Ge Zhou
; | | Date: |
15 May 2002 | | Journal: | Nucl.Phys. B648 (2003) 523-541 | | Subject: | hep-th | | Abstract: | We construct D-branes in a left-right asymmetrically gauged WZW model, with the gauge subgroup embedded differently on the left and the right of the group element. The symmetry-preserving boundary conditions for the group-valued field $g$ are described, and the corresponding action is found. When the subgroup $H=U(1)$, we can implement T-duality on the axially gauged WZW action; an orbifold of the vectorially gauged theory is produced. For the parafermion $SU(2)/U(1)$ coset model, a $sigma$-model is obtained with vanishing gauge field on D-branes. We show that a boundary condition surviving from the SU(2) parent theory characterizes D-branes in the parafermion theory, determining the shape of A-branes. The gauge field on B-branes is obtained from the boundary condition for A-branes, by the orbifold construction and T-duality. These gauge fields stabilize the B-branes. | | Source: | arXiv, hep-th/0205161 | | Services: | Forum | Review | PDF | Favorites | |
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