Nuclear Physics B, ( ISI ), Year (2007-3)

#### Title : excited D-brane decay in cubic string ( Non-abelian expansion of S-matrix elements and non-abelian tachyon DBI action )

Authors: - - , Mohammad Reza Garousi ,

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We apply the prescription proposed in hep-th/0307197 for non-abelian expansion of S-matrix elements, to the S-matrix element of four tachyons and one gauge field in superstring theory. We show that the leading order terms of the expansion are in perfect agreement with the non-abelian generalization of the tachyon DBI action in which the tachyon potential is $V(T)=1+\\pi\\alpha\' m^2T^2+\\frac{1}{2!}(\\pi\\alpha\' m^2T^2)^2+...$ where $m^2=-1/(2\\alpha\')$ is the mass of tachyon. This calculation fixes the coefficient of $T^4$ in the potential without on-shell ambiguity.

#### Keywords

, Non, abelian tachyon
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@article{paperid:202069,
author = { -, - and Garousi, Mohammad Reza},
title = {excited D-brane decay in cubic string},
journal = {Nuclear Physics B},
year = {2007},
month = {March},
issn = {0550-3213},
keywords = {Non-abelian tachyon action},
}

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%0 Journal Article
%T excited D-brane decay in cubic string
%A -, -
%A Garousi, Mohammad Reza
%J Nuclear Physics B
%@ 0550-3213
%D 2007

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