# Open superstring field theory including the Ramond sector based on the supermoduli space

## TL;DR

This paper develops a gauge-invariant open superstring field theory action including the Ramond sector, based on supermoduli space covering, with explicit construction up to quartic interactions and incorporation of stubs.

## Contribution

It introduces a novel supermoduli space-based approach to include the Ramond sector in open superstring field theory with an $A_$ structure and explicit quartic action.

## Key findings

- Constructed gauge-invariant action including Ramond sector
- Explicit quartic order action with stubs incorporated
- Action naturally has an $A_$ structure

## Abstract

We construct a gauge-invariant action for open superstring field theory up to quartic order including the Ramond sector based on the covering of the supermoduli space of super-Riemann surfaces, following the approach presented by Ohmori and Okawa. Since our approach is based on the covering of the supermoduli space, the resulting action naturally has an $A_\infty$ structure. In our construction, adding stubs to the star product can be easily incorporated, and we explicitly construct an action for open superstring field theory including the Ramond sector with stubs up to quartic interactions.