A Covariant Action with a Constraint and Feynman Rules for Fermions in Open Superstring Field Theory

Yoji Michishita
2005 Journal of High Energy Physics  
In a way analogous to type IIB supergravity, we give a covariant action for the fermion field supplemented with a constraint which should be imposed on equations of motion, in Berkovits' open superstring field theory. From this action we construct Feynman rules for computing perturbative amplitudes for fermions. We show that on-shell tree level 4-point amplitudes computed by using these rules coincide with those of the first quantization formalism.
doi:10.1088/1126-6708/2005/01/012 fatcat:rz6uur7nbvecfdvym4lr5tyql4