D-branes as tachyon lumps in string field theory

Moeller, Nicolas ; Zwiebach, Barton ; Sen, Ashoke (2000) D-branes as tachyon lumps in string field theory Journal of High Energy Physics, 2000 (8). No pp. given. ISSN 1126-6708

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Official URL: http://iopscience.iop.org/1126-6708/2000/08/039?fr...

Related URL: http://dx.doi.org/10.1088/1126-6708/2000/08/039

Abstract

It has been conjectured that the tachyonic lump solution of the open bosonic string field theory describing a D-brane represents a D-brane of one lower dimension. We place the lump on a circle of finite radius and develop a variant of the level expansion scheme that allows systematic account of all higher derivative terms in the string field theory action, and gives a calculational scheme that can be carried to arbitrary accuracy. Using this approach we obtain lump masses that agree with expected D-brane masses to an accuracy of about 1%. We find convincing evidence that in string field theory the lump representing a D-brane is an extended object with a definite profile. A gaussian fit to the lump gives a 6-sigma size of 9.3√α'. The level truncation scheme developed here naturally gives rise to an infrared and ultraviolet cut-off, and may be useful in the study of quantum string field theory.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:D-branes; Bosonic Strings
ID Code:44030
Deposited On:20 Jun 2011 07:59
Last Modified:18 May 2016 00:50

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