7 research outputs found
N=2 S-duality via Outer-automorphism Twists
Compactification of 6d N=(2,0) theory of type G on a punctured Riemann
surface has been effectively used to understand S-dualities of 4d N=2 theories.
We can further introduce branch cuts on the Riemann surface across which the
worldvolume fields are transformed by the discrete symmetries associated to
those of the Dynkin diagram of type G. This allows us to generate more
S-dualities, and in particular to reproduce a couple of S-dual pairs found
previously by Argyres and Wittig.Comment: 8 pages, 6 figure
Nilpotent orbits and codimension-two defects of 6d N=(2,0) theories
We study the local properties of a class of codimension-2 defects of the 6d
N=(2,0) theories of type J=A,D,E labeled by nilpotent orbits of a Lie algebra
\mathfrak{g}, where \mathfrak{g} is determined by J and the outer-automorphism
twist around the defect. This class is a natural generalisation of the defects
of the 6d theory of type SU(N) labeled by a Young diagram with N boxes. For any
of these defects, we determine its contribution to the dimension of the Higgs
branch, to the Coulomb branch operators and their scaling dimensions, to the 4d
central charges a and c, and to the flavour central charge k.Comment: 57 pages, LaTeX2