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Mixed (open/closed) N=(2,2) string theory as an integrable deformation of self-duality

Sergei V. Ketov

hep-tharXiv:hep-th/9612170

Abstract

The exact effective field equations of motion, corresponding to the perturbative mixed theory of open and closed (2,2) world-sheet supersymmetric strings, are investigated. It is shown that they are only integrable in the case of an abelian gauge group. The gravitational equations are then stationary with respect to the Born-Infeld-type effective action.

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