On modified tachyon DBI action
High Energy Physics - Theory
2011-06-24 v3
Abstract
Recently a modification of the tachyon DBI action has been proposed in which the tachyon carries the internal CP matrix \sigma_1 and \sigma_2. In this paper, we find the momentum expansion of the disk level S-matrix element of four tachyons and one gauge field in superstring theory and show that the first and second order terms of the expansion are in perfect agreement with the above tachyon DBI action.
Keywords
Cite
@article{arxiv.0811.4334,
title = {On modified tachyon DBI action},
author = {Mohammad R. Garousi},
journal= {arXiv preprint arXiv:0811.4334},
year = {2011}
}
Comments
15 pages, no figure; V2: typos corrected, a reference added; V3: the final version to appear in Nucl. Phys. B