592 research outputs found
Supersymmetry Enhancement and Junctions in S-folds
We study supersymmetry enhancement from to proposed
by Aharony and Tachikawa by using string junctions in S-folds. The central
charges carried by junctions play a central role in our analysis. We consider
planer junctions in a specific plane. Before the S-folding they carry two
complex central charges, which we denote by and . The S-fold
projection eliminates as well as one of the four supercharges, and
when the supersymmetry is enhanced should be reproduced by some
non-perturbative mechanism. For the models of and
S-folds which are expected to give and theories we
compare the junction spectra with those in perturbative brane realization of
the same theories. We establish one-to-one correspondence so that
coincides. By using the correspondence we also give an expression for the
enhanced central charge .Comment: 30 pages, 7 figures, v2: minor corrections, version accepted for
publication in JHE
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