Off-shell extension of S-matrix elements and tachyonic effective actions

Details Off-shell extension of S-matrix elements and tachyonic effective actions Off-shell extension of S-matrix elements and tachyonic effective actions

2003-03-27

arxiv.org/abs/hep-th/0303239v3

JHEP 0304 (2003) 027

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 17 pages, v3:a paragraph comparing off-shell and on- shell amplitudes added, reference added

Scientific paper

10.1088/1126-6708/2003/04/027

We show that the on-shell S-matrix elements of four open string massless scalars, two scalars and two tachyons, and four open string tachyons in the super string theory can be written in a unique form. We then propose an off-shell extension for the S-matrix element of four scalars which is consistent, in the low energy limit, with the Dirac-Born-Infeld effective action. Using a similar off-shell extension for the S-matrix element of two scalars and two tachyons and for the S-matrix element of four tachyons, we show that they are fully consistent with the tachyonic DBI action.

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