Gauge invariant and gauge fixed actions for various higher-spin fields from string field theory

Understand

We propose a systematic procedure for extracting gauge invariant and gauge fixed actions for various higher-spin gauge field theories from covariant bosonic open string field theory.

• By identifying minimal gauge invariant part for the original free string field theory action, we explicitly construct a class of covariantly gauge fixed actions with BRST and anti-BRST invariance.
• By expanding the actions with respect to the level N of string states, the actions for various massive fields including higher-spin fields are systematically obtained.
• As illustrating examples, we explicitly investigate the level N<=3 part and obtain the consistent actions for massive graviton field, massive 3rd rank symmetric tensor field, or antisymmetric field.