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“School of Physic”

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Paper   IPM / Physic / 6663
School of Physics
  Title:   String Scattering from D-Branes in Type 0 Theories
  Author(s):  M.R. Garousi
  Status:   Published
  Journal: Nucl. Phys. B
  No.:  40
  Vol.:  550
  Year:  1999
  Pages:   225-237
  Supported by:  IPM
  Abstract:
We derive fully covariant expressions for all two-point scattering amplitudes involving closed string tachyon and massless strings from Dirichlet brane in type 0 theories. The amplitude for two massless D-brane fluctuations to product closed string tachyon is also evaluated. We then examine in detail these string scattering amplitudes in order to extract world-volume couplings of the tachyon with itself and with massless fields on a D-brane. We find that the tachyon appears as an overall coupling function in the Born-Infeld action and conjecture form of the function.

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