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SL(2, $\mathbb C$) quartic vertex for closed string field theory
by Harold Erbin, Suvajit Majumder
Submission summary
| Authors (as registered SciPost users): | Harold Erbin |
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| Preprint Link: | https://arxiv.org/abs/2311.07367v1 (pdf) |
| Date submitted: | 2024-02-03 19:00 |
| Submitted by: | Erbin, Harold |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
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| Academic field: | Physics |
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| Approach: | Theoretical |
Abstract
We construct the $\mathrm{SL}(2, \mathbb C)$ quartic vertex with a generic stub parameter for the bosonic closed string field theory by characterizing the vertex region in the moduli space of 4-punctured sphere, and providing the necessary and sufficient constraints for the local coordinate maps. While $\mathrm{SL}(2, \mathbb C)$ vertices are not known to have a nice geometric recursive construction like the minimal area or hyperbolic vertices, they can be studied analytically which makes them more convenient for simple computations. In particular, we obtain exact formulas for the parametrization and volume of the vertex region as a function of the stub parameter. The main objective of having an explicit quartic vertex is to later study its decomposition using auxiliary fields.