Closed-string Tachyon Condensation and the On-shell Effective Action of Open-string Tachyons

Abstract

We study how the effect of closed-string tachyon condensation can enter into the on-shell effective action of open-string tachyons in the bosonic case. We also consider open-string one-loop quantum corrections to the on-shell action. We use a sigma-model approach with boundary terms, and we utilize some results of boundary string field theory (BSFT) to define the on-shell effective action. We regard D-instanton-like objects with appropriate weight as closed-string tachyon tadpoles, and we insert them into worldsheets to analyze the effect of closed-string tachyons.

Latex, 33pages. V3/ Typos corrected and sentences improved. References added. V4/ Conclusion changed. Sentences improved, Appendix added, references added. V5/ Sentences improved, to appear in Prog.Theor.Phys

References in corpus (8)

• Loop Corrected Tachyon Condensation
• Tachyon Condensation and Background Independent Superstring Field Theory
• Tachyon Condensation and Spectrum of Strings on D-branes
• Tachyon condensation in boundary string field theory at one loop
• Background Independent Open String Field Theory with Constant B field On the Annulus
• More About Partition Function of Open Bosonic String in Background Fields and String Theory Effective Action
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• Closed-string Tachyon Condensation and the On-shell Effective Action of Open-string Tachyons

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• Progress in QCD next-to-leading order calculations
• Extension of Boundary String Field Theory on Disc and RP2 Worldsheet Geometries
• On open-closed extension of boundary string field theory
• Off-shell Crosscap State and Orientifold Planes with Background Dilatons