Closed Bosonic String Field Theory At Quartic Order

Abstract

We give a complete numerical description of the geometry of the four-point contact interaction of closed bosonic string field theory. Namely, we compute the boundary of the relevant region of the moduli space of the four-punctured spheres, and everywhere in this region we give the local coordinates around each punctures in terms of a Strebel quadratic differential and mapping radii. The numerical methods are explained in details. And the results are translated into fits, which can in principle be used to compute the contact interaction of any four off-shell string states.

23 pages, 6 figures. Section 6 clarified by better notations and the addition of a figure; added footnote and references about integrability; improved the accuracy of the comparison in the last line of Section 7

References in corpus (1)

• On Localized Tachyon Condensation in $\BC^2/\BZ_n$ and $\BC^3/\BZ_n$

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