Construction of action for heterotic string field theory including the Ramond sector

TL;DR

This paper develops a comprehensive action for heterotic string field theory, extending previous open superstring formulations, and explicitly constructs it up to quartic order in the Ramond sector.

Contribution

It introduces a complete heterotic string field theory action including the Ramond sector, extending prior open superstring formulations and employing a dual eta-Q formulation.

Findings

Explicit quadratic and quartic order action constructed

Dual formulation exchanging eta and Q used successfully

Advances the understanding of heterotic string field theory structure

Abstract

Extending the formulation for open superstring field theory given in arXiv:1508.00366, we attempt to construct a complete action for heterotic string field theory. The action is non-polynomial in the Ramond string field Psi, and we construct it order by order in Psi. Using a dual formulation in which the role of eta and Q is exchanged, the action is explicitly obtained at the quadratic and quartic order in Psi with the gauge transformations.