# Closed bosonic string field theory at quartic order

@article{Moeller2004ClosedBS, title={Closed bosonic string field theory at quartic order}, author={Nicolas Moeller}, journal={Journal of High Energy Physics}, year={2004}, volume={2004}, pages={018-018} }

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…

## 40 Citations

### Closed bosonic string field theory at quintic order: five-tachyon contact term and dilaton theorem

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- 2006

We solve the geometry of the closed string field theory five-point vertex. Our solution is calculated in terms of quadratic Strebel differentials which are found numerically all over the relevant…

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We compute the off-shell 1-loop tadpole amplitude in heterotic string field theory. With a special choice of cubic vertex, we show that this amplitude can be computed exactly. We obtain explicit and…

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- 2005

In bosonic closed string field theory the ``tachyon potential" is a potential for the tachyon, the dilaton, and an infinite set of massive fields. Earlier computations of the potential did not…

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### String field theory solution for any open string background. Part II

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### Quantum Closed Superstring Field Theory and Hyperbolic Geometry I: Construction of String Vertices

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The complete quantum theory of closed superstrings is constructed using string diagrams endowed with metric having constant curvature $-1$. The elementary string diagrams are equipped with the…

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