Gauge Invariance and Tachyon Condensation in Open String Field Theory

Details Gauge Invariance and Tachyon Condensation in Open String Field Theory Gauge Invariance and Tachyon Condensation in Open String Field Theory

2001-05-16

arxiv.org/abs/hep-th/0105156v1

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, 3 figures, LaTeX; work presented by WT at Strings 2001

Scientific paper

The gauge invariance of open string field theory is considered from the point of view of level truncation, and applications to the tachyon condensation problem are discussed. We show that the region of validity of Feynman-Siegel gauge can be accurately determined using the level truncation method. We then show that singularities previously found in the tachyon effective potential are gauge artifacts arising from the boundary of the region of validity of Feynman-Siegel gauge. The problem of finding the stable vacuum and tachyon potential without fixing Feynman-Siegel gauge is addressed.

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