Gauge Fixing and Scattering Amplitudes in String Field Theory Expanded around Universal Solutions

Abstract

We study a gauge fixed action of open string field theory expanded around the universal solution which has been found as an analytic classical solution with one parameter a. For a>-1/2, we are able to reproduce open string scattering amplitudes in the theory fixed in the Siegel gauge. At a=-1/2, all scattering amplitudes vanish and there is no open string excitation in the gauge fixed theory. These results support the conjecture that the universal solution can be regarded as pure gauge or the tachyon vacuum solution.

23 pages, LaTeX with PTPTeX.cls, 1 eps figure. minor corrections, published version

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• Descent Relations Among Bosonic D-branes
• Star Algebra Spectroscopy
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• Siegel Gauge in Vacuum String Field Theory
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• Tachyon Dynamics in Open String Theory
• Analytic solution for tachyon condensation in open string field theory
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• Tachyon Condensation and Universal Solutions in String Field Theory
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• Regularization of identity based solution in string field theory
• Solving Witten's string field theory using the butterfly state
• Homotopy Operators and One-Loop Vacuum Energy at the Tachyon Vacuum
• Vacuum string field theory without matter-ghost factorization
• Classical Solutions and Order of Zeros in Open String Field Theory
• Closed String Amplitudes in Open String Field Theory
• Brane Decay and Death of Open Strings
• Exploring Vacuum Structure around Identity-Based Solutions
• Comments on Takahashi-Tanimoto's scalar solution
• Exploring Vacuum Manifold of Open String Field Theory
• Analytical Tachyonic Lump Solutions in Open Superstring Field Theory
• Solving Witten's SFT by Insertion of Operators on Projectors
• Closed string symmetries in open string field theory: tachyon vacuum as sine-square deformation
• Observables for identity-based tachyon vacuum solutions
• Twist Symmetry and Classical Solutions in Open String Field Theory
• Virasoro algebra in $K$-space