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arxiv: 0804.1131 · v1 · submitted 2008-04-07 · ✦ hep-th

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The closed string tadpole in open string field theory

Ian Ellwood
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classification ✦ hep-th
keywords stringclosedfieldobservablestadpoletheoryanalogousappropriate
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We compute a class of gauge invariant observables for marginal solutions and the tachyon vacuum. In each case we find that the observables are related in a simple way to the closed-string tadpole on a disk with appropriate boundary conditions. We give a sketch of an argument that this result should hold in general using the BRST invariance of the closed string two-point function. Finally, we discuss the analogous set of invariants in the Berkovits superstring field theory.

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  1. Higher Connection in Open String Field Theory

    hep-th 2026-02 unverdicted novelty 7.0

    A 2-form connection is defined in the space of open string field theory solutions, producing invariant higher holonomies and 3-form curvature potentially corresponding to the B-field.