2,295 research outputs found
On 6d N=(2,0) theory compactified on a Riemann surface with finite area
We study 6d N=(2,0) theory of type SU(N) compactified on Riemann surfaces
with finite area, including spheres with fewer than three punctures. The Higgs
branch, whose metric is inversely proportional to the total area of the Riemann
surface, is discussed in detail. We show that the zero-area limit, which gives
us a genuine 4d theory, can involve a Wigner-Inonu contraction of global
symmetries of the six-dimensional theory. We show how this explains why
subgroups of SU(N) can appear as the gauge group in the 4d limit. As a
by-product we suggest that half-BPS codimension-two defects in the
six-dimensional (2,0) theory have an operator product expansion whose operator
product coefficients are four-dimensional field theories.Comment: 22 pages, 4 figure
Supersymmetric Probes in a Rotating 5D Attractor
Supersymmetric zero-brane and one-brane probes in the squashed near-horizon geometry of the BMPV black hole are studied. Supersymmetric
zero-brane probes stabilized by orbital angular momentum on the are found
and shown to saturate a BPS bound. We also find supersymmetric one-brane probes
which have momentum and winding around a torus in the
and in some cases are static.Comment: 13 page
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