Virasoro amplitude from the $S^N{\mathbb{R}}^{24}$ orbifold sigma model

Abstract

Four tachyon scattering amplitude is derived from the $S^N{\mathbb{R}}^{24}$ orbifold sigma model in the large $N$ limit. The closed string interaction is described by a vertex which is a bosonic analog of the supersymmetric one, recently proposed by Dijkgraaf, Verlinde and Verlinde.

latex, 28 pages, pictures are added

References in corpus (2)

• Proposals on nonperturbative superstring interactions
• Heterotic M(atrix) Strings and Their Interactions

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