“School of Physics”

Back to Papers Home
Back to Papers of School of Physics

Paper   IPM / P / 6901
School of Physics
  Title:   On-Shell S-Matrix and Tachyonic Effective Actions
  Author(s):  M.R. Garousi
  Status:   Published
  Journal: Nucl. Phys. B
  No.:  40
  Vol.:  647
  Year:  2002
  Pages:   117-130
  Supported by:  IPM
  Abstract:
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 T4 term in the expansion of the tachyon potential around its maximum.

Download TeX format
back to top
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
scroll left or right