## “School of Physic”

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Paper   IPM / Physic / 9464
School of Physics
Title:   More on WZ Action of Non-BPS Branes
Author(s):
 1 M.R. Garousi 2 E. Hatefi
Status:   Preprint
Journal:
Year:  2008
Supported by:  IPM
Abstract:
We calculate the disk level S-matrix element of one Ramond-Ramond, two gauge fields and one tachyon vertex operators in the world volume of non-BPS branes. We then find the momentum expansion of this amplitude and show that the infinite tachyon/massless poles and the contact terms of this amplitude can be reproduced by the tachyon DBI and the WZ actions, and by their higher derivative corrections.

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