Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-02-19
Phys.Rev. D67 (2003) 126007
Physics
High Energy Physics
High Energy Physics - Theory
29 pages
Scientific paper
10.1103/PhysRevD.67.126007
We propose an analytic framework to study the nonperturbative solutions of Witten's open string field theory. The method is based on the Moyal star formulation where the kinetic term can be split into two parts. The first one describes the spectrum of two identical half strings which are independent from each other. The second one, which we call midpoint correction, shifts the half string spectrum to that of the standard open string. We show that the nonlinear equation of motion of string field theory is exactly solvable at zeroth order in the midpoint correction. An infinite number of solutions are classified in terms of projection operators. Among them, there exists only one stable solution which is identical to the standard butterfly state. We include the effect of the midpoint correction around each exact zeroth order solution as a perturbation expansion which can be formally summed to the complete exact solution.
Bars Itzhak
Kishimoto Isao
Matsuo Yoshinori
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