Off-shell interactions for closed-string tachyons

Dabholkar, Atish ; Iqubal, Ashik ; Raeymaekers, Joris (2004) Off-shell interactions for closed-string tachyons Journal of High Energy Physics, 2004 (5). 051-051. ISSN 1126-6708

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Official URL: http://iopscience.iop.org/1126-6708/2004/05/051

Related URL: http://dx.doi.org/10.1088/1126-6708/2004/05/051

Abstract

Off-shell interactions for localized closed-string tachyons in C/ZN superstring backgrounds are analyzed and a conjecture for the effective height of the tachyon potential is elaborated. At large-N, some of the relevant tachyons are nearly massless and their interactions can be deduced from the S-matrix. The cubic interactions between these tachyons and the massless fields are computed in a closed form using orbifold CFT techniques. The cubic interaction between nearly-massless tachyons with different charges is shown to vanish and thus condensation of one tachyon does not source the others. It is shown that to leading order in N, the quartic contact interaction vanishes and the massless exchanges completely account for the four point scattering amplitude. This indicates that it is necessary to go beyond quartic interactions or to include other fields to test the conjecture for the height of the tachyon potential.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
Keywords:Superstrings and Heterotic Strings; Tachyon Condensation
ID Code:8167
Deposited On:26 Oct 2010 17:44
Last Modified:30 May 2011 10:33

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