Open string decoupling and tachyon condensation

Details Open string decoupling and tachyon condensation Open string decoupling and tachyon condensation

2001-03-08

arxiv.org/abs/hep-th/0103056v4

JHEP 0106:012,2001

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, LaTeX, v.3 references added, v4 comment added/to appear in JHEP

Scientific paper

10.1088/1126-6708/2001/06/012

The amplitudes in perturbative open string theory are examined as functions of the tachyon condensate parameter. The boundary state formalism demonstrates the decoupling of the open string modes at the non-perturbative minima of the tachyon potential via a degeneration of open world-sheets and identifies an independence of the coupling constants $g_s$ and $g_{YM}$ at general values of the tachyon condensate. The closed sector is generated at the quantum level; it is also generated at the classical level through the condensation of the propagating open string modes on the D-brane degrees of freedom.

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