Normalization of the Background Independent Open String Field Theory Action

Details Normalization of the Background Independent Open String Field Theory Action Normalization of the Background Independent Open String Field Theory Action

2000-09-25

arxiv.org/abs/hep-th/0009191v3

JHEP 0011:021,2000

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX file, 8 pages, references added

Scientific paper

10.1088/1126-6708/2000/11/021

It has been shown recently that the background independent open string field theory provides an exact description of the tachyon condensation on unstable D-branes of bosonic string theory. In this analysis the overall normalisation of the action was chosen so that it reproduces the conjectured relations involving tachyon condensation. In this paper we fix this normalisation by comparing the on-shell three tachyon amplitude computed from the background independent open string field theory with the same amplitude computed from the cubic open string field theory, which in turn agrees with the result of the first quantised theory. We find that this normalisation factor is in precise agreement with the one required for verifying the conjectured properties of the tachyon potential.

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