Chiral Symmetry from Type IIA Branes

Details Chiral Symmetry from Type IIA Branes Chiral Symmetry from Type IIA Branes

1997-06-06

arxiv.org/abs/hep-th/9706047v1

Nucl.Phys. B509 (1998) 145-168

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, 5 figures

Scientific paper

10.1016/S0550-3213(97)00595-6

We propose a mechanism in which, using an eightbrane, a sixbrane ends on a NS brane in type IIA superstring theory. We use this mechanism to construct N=1 supersymmetric gauge theories in four dimensions with chiral matter localized in different points in space. Anomaly cancellation for the gauge theories is satisfied by requiring RR charge conservation for the various type IIA fields. The construction allows us to study a curious phase transition in which the number of flavors in supersymmetric QCD depends on the value of the ten dimensional cosmological constant. These phenomena are related to the fact that every time a D8-brane crosses a NS brane, a D6-brane is created in between them.

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