The Twisted String Vertex Algorithm Applied to the $Z_2$-Twisted Scalar String Four Vertex

Abstract

Recently an algorithm was found by means of which one can calculate terms at arbitrary oscillator level in the four-Ramond vertex obtained by sewing. Here we show that this algorithm is applicable also to the case of ${\mathbf{Z}}_2$-twisted scalars and derive the full propagator for scalars on the Riemann sphere with two branch cuts. The relation to similar results previously derived in the literature by other means is discussed briefly.

18 pages (LaTeX), Göteborg ITP 94-9

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Cited by in corpus (4)

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• Canonical quantization of a string describing $N$ branes at angles
• ${\mathbb{Z}}_2$ boundary twist fields and the moduli space of D-branes
• Towards a fully stringy computation of Yukawa couplings on non factorized tori and non abelian twist correlators (I): the classical solution and action