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Erler, Theodore; Konopka, Sebastian; Sachs, Ivo (2014): Resolving Witten's superstring field theory. In: Journal of High Energy Physics, Nr. 4, 150
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Abstract

We regulate Witten's open superstring field theory by replacing the picturechanging insertion at the midpoint with a contour integral of picture changing insertions over the half-string overlaps of the cubic vertex. The resulting product between string fields is non-associative, but we provide a solution to the A(infinity) relations defining all higher vertices. The result is an explicit covariant superstring field theory which by construction satisfies the classical BV master equation.