Closed String Amplitudes in Open String Field Theory
arXiv:hep-th/0307173 · doi:10.1088/1126-6708/2003/08/020
Abstract
We investigate gauge invariant operators corresponding to on-shell closed string states in open string field theory. Using both oscillator representation and conformal mapping techniques, we calculate a two closed string tachyon amplitude that connects two gauge invariant operators by an open string propagator.We find that this amplitude is in a complete agreement with the usual disc amplitude.
14 pages, 3 figures