2002/05/31 by Isao Kishimoto, Tomohiko Takahashi
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1143/ptp.108.591
published as Prog.Theor.Phys. 108 (2002) 591-602 · 14 pages, LaTeX with ptptex.cls, typos corrected
arxiv created 2002/08/13 · arxiv updated 2009/11/30
We study the physical spectrum of cubic open string field theory around universal solutions, which are constructed using the matter Virasoro operators and the ghost and anti-ghost fields. We find the cohomology of the new BRS charge around the solutions, which appear with a ghost number that differs from that of the original theory. Considering the gauge-unfixed string field theory, we conclude that open string excitations perturbatively disappear after the condensation of the string field to the solutions.