Abstract
There are various reasons why adding stubs to the vertices of open string field theory (OSFT) is interesting: the stubs can not only tame certain singularities and make the theory more well-behaved, but also the new theory shares a lot of similarities with closed string field theory, which helps to improve our understanding of its structure and possible solutions. In this paper we explore two natural ways of implementing stubs into the framework of OSFT, resulting in an A∞-algebra giving rise to infinitely many vertices. We find two distinct consistent actions, both generated by a field redefinition, interestingly sharing the same equations of motion. In the last section we illustrate their relationship and physical meaning by applying our construction to nearly marginal solutions.
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Acknowledgments
We thank Ted Erler, Jakub Vošmera, Branislav Jurčo, Igor Khavkine and Martin Markl for useful discussions. Our work has been funded by the Grant Agency of Czech Republic under the grant EXPRO 20-25775X.
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Schnabl, M., Stettinger, G. Open string field theory with stubs. J. High Energ. Phys. 2023, 32 (2023). https://doi.org/10.1007/JHEP07(2023)032
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DOI: https://doi.org/10.1007/JHEP07(2023)032