Topics in String Field Theory

Details Topics in String Field Theory Topics in String Field Theory

2003-04-30

arxiv.org/abs/hep-th/0304270v3

Physics

High Energy Physics

High Energy Physics - Theory

47 pages, 1 figure, JHEP, v3: some comments and a footnote added in section 4, comments in section 5.1 modified, 1 reference a

Scientific paper

This review of bosonic string field theory is concentrated on two main subjects. In the first part we revisit the construction of the three string vertex and rederive the relevant Neumann coefficients both for the matter and the ghost part following a conformal field theory approach. We use this formulation to solve the VSFT equation of motion for the ghost sector. This part of the paper is based on a new method which allows us to derive known results in a simpler way. In the second part we concentrate on the solution of the VSFT equation of motion for the matter part. We describe the construction of the three strings vertex in the presence of a background B field. We determine a large family of lump solutions, illustrate their interpretation as D-branes and study the low energy limit. We show that in this limit the lump solutions flow toward the so-called GMS solitons.

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