D-brane States and Annulus Amplitudes in OSp Invariant Closed String Field Theory

TL;DR

This paper constructs D-brane states in OSp invariant closed string field theory and computes annulus amplitudes, demonstrating consistency with first quantized string theory results.

Contribution

It introduces a method to represent parallel D-branes in OSp invariant closed string field theory and verifies amplitude calculations against established string theory results.

Findings

D-brane states constructed in OSp invariant framework

Annulus amplitudes match first quantized string theory

Validation of the OSp invariant approach for D-brane interactions

Abstract

In the OSp invariant closed string field theory, we construct the states corresponding to parallel D-branes that are located at different points in the space-time. Using these states, we evaluate annulus amplitudes. We show that the results coincide with those of first quantized string theory.