# Taming boundary condition changing operator anomalies with the tachyon vacuum

## TL;DR

This paper addresses associativity anomalies in superstring field theory by constructing generalized solutions using boundary condition changing operators, ensuring consistent equations of motion at the tachyon vacuum.

## Contribution

It introduces a method to build solutions from boundary condition changing operators that mitigate anomalies in superstring field theory.

## Key findings

- Identifies conditions to avoid ambiguous products in equations of motion.
- Provides a generalized solution framework within the $KBc$ subalgebra.
- Ensures consistency of the superstring field theory at the tachyon vacuum.

## Abstract

Motivated by the appearance of associativity anomalies in the context of superstring field theory, we give a generalized solution built from boundary condition changing operators which can be associated to a generic tachyon vacuum in the $KBc$ subalgebra of the Okawa form. We articulate sufficient conditions on the choice of tachyon vacuum to ensure that ambiguous products do not appear in the equations of motion.