Nuclear Physics B, ( ISI ), Year (2002-11)

Title : On-shell S-matrix and tachyonic effective actions ( On-shell S-matrix and tachyonic effective actions )

Authors: Mohammad Reza Garousi ,

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We evaluate various disk level four-point functions involving the massless scalar and tachyon vertex operators in the presence of background B-flux in superstring theory. By studying these amplitudes in specific limits, we find couplings of two scalars with two tachyons, and couplings of four tachyons on the world-volume of non-BPS D-branes of superstring theory. They are fully consistent with the non-commutative tachyonic Dirac-Born-Infeld effective action. They also fix the coefficient of $T^4$ term in the expansion of the tachyon potential around its maximum.


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author = {Garousi, Mohammad Reza},
title = {On-shell S-matrix and tachyonic effective actions},
journal = {Nuclear Physics B},
year = {2002},
month = {November},
issn = {0550-3213},
keywords = {On-shell S-matrix},


%0 Journal Article
%T On-shell S-matrix and tachyonic effective actions
%A Garousi, Mohammad Reza
%J Nuclear Physics B
%@ 0550-3213
%D 2002