Journal of High Energy Physics, ( ISI ), Year (2003-5)

#### Title : Slowly varying tachyon and tachyon potential ( Slowly varying tachyon and tachyon potential )

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We show that the scattering amplitude of four open string scalars or tachyons on the world-volume of a D$_p$-brane in the bosonic string theory can be written in a universal form. The difference between this amplitude and the corresponding amplitude in the superstring theory is in an extra tachyonic pole. We show that in an $\\\\alpha\\\'$ expansion and for slowly varying fields, the amplitude is consistent with the tachyonic DBI action in which the even part of the tachyon potential is $V(T)=e^{-(\\\\sqrt{\\\\pi} T/\\\\alpha)^2}$ with $\\\\alpha=1$ for bosonic theory and $\\\\alpha=\\\\sqrt{2}$ for superstring theory.

#### Keywords

, Bosonic string, Tachyon
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@article{paperid:326,
title = {Slowly varying tachyon and tachyon potential},
journal = {Journal of High Energy Physics},
year = {2003},
month = {May},
issn = {1029-8479},
keywords = {Bosonic string; Tachyon condensation},
}