Spacetime Supersymmetry in a Nontrivial Ns-ns Superstring Background
نویسندگان
چکیده
In this paper we consider superstring propagation in a nontrivial NS-NS background. We deform the world sheet stress tensor and supercurrent with an infinitesimal Bμν field. We construct the gauge-covariant super-Poincaré generators in this background and show that the Bμν field spontaneously breaks spacetime supersymmetry. We find that the gauge-covariant spacetime momenta cease to commute with each other and with the spacetime supercharges. We construct a set of “magnetic” superPoincaré generators that are conserved for constant field strength Hμνλ, and show that these generators obey a “magnetic” extension of the ordinary supersymmetry algebra. [email protected] [email protected]
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