title: Open-closed string duality at tree level.
abstract: We study the decay of unstable D-branes in string theory in the presence of an electric field, and show that the classical open string theory results for various properties of the final state agree with the properties of closed string states into which the system is expected to decay. This suggests a duality between tree level open string theory on unstable D-branes and closed strings at high density.
authors: Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad 211019, India. ashoke.sen@cern.ch
authors: Ashoke
authors: A
authors: Sen