Open String Amplitudes in Various Gauges

Details Open String Amplitudes in Various Gauges Open String Amplitudes in Various Gauges

2006-09-07

arxiv.org/abs/hep-th/0609047v2

JHEP 0701:011,2007

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, minor corrections

Scientific paper

10.1088/1126-6708/2007/01/011

Recently, Schnabl constructed the analytic solution of the open string tachyon. Subsequently, the absence of the physical states at the vacuum was proved. The development relies heavily on the use of the gauge condition different from the ordinary one. It was shown that the choice of gauge simplifies the analysis drastically. When we perform the calculation of the amplitudes in Schnabl gauge, we find that the off-shell amplitudes of the Schnabl gauge is still very complicated. In this paper, we propose the use of the propagator in the modified Schnabl gauge and show that this modified use of the Schnabl gauge simplifies the computation of the off-shell amplitudes drastically. We also compute the amplitudes of open superstring in this gauge.

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