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arxiv: hep-th/9901085 · v3 · submitted 1999-01-20 · ✦ hep-th

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String Scattering from D-branes in Type 0 Theories

Mohammad R. Garousi
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classification ✦ hep-th
keywords stringtachyonmasslessscatteringamplitudesclosedd-branetheories
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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 produce 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.

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