Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-03-28
Nucl.Phys. B505 (1997) 251-271
Physics
High Energy Physics
High Energy Physics - Theory
24 pages, harvmac.tex (b), 6 figures, epsf.tex (Major improvements to figures; minor improvements to text.)
Scientific paper
10.1016/S0550-3213(97)00384-2
Recently, a D-brane construction in type IIA string theory was shown to yield the electric/magnetic duality of four dimensional N=1 supersymmetric U(N_c) gauge theories with N_f flavours of quark. We present here an extension of that construction which yields the electric/magnetic duality for the SO(N_c) and USp(N_c) gauge theories with N_f quarks, by adding an orientifold plane which is consistent with the supersymmetry. Due to the intersection of the orientifold plane with the NS-NS fivebranes already present, new features arise which are crucial in determining the correct final structure of the dualities.
Evans Nick
Johnson Clifford V.
Shapere Alfred D.
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