Gauge-invariant observables and marginal deformations in open string field theory

被引：0
作者：
Matěj Kudrna
Toru Masuda
Yuji Okawa
Martin Schnabl
Kenichiro Yoshida
机构：
[1] Institute of Physics AS CR,Institute of Physics
[2] The University of Tokyo,undefined
[3] Ministry of Internal Affairs and Communications,undefined
来源：
Journal of High Energy Physics | / 2013卷
关键词：
String Field Theory; Tachyon Condensation; D-branes;
D O I：
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学科分类号：
摘要：
The level-truncation analysis of open string field theory for a class of periodic marginal deformations indicates that a branch of solutions in Siegel gauge exists only for a finite range of values of the marginal field. The periodicity in the deformation parameter is thus obscure. We use the relation between gauge-invariant observables and the closed string tadpole on a disk conjectured by Ellwood to construct a map between the deformation parameter of the boundary conformal field theory and the parameter labeling classical solutions of open string field theory. We evaluate the gauge-invariant observables for the numerical solutions in Siegel gauge up to level 12 and find that our results qualitatively agree with the analysis by Sen using the energy-momentum tensor and are consistent with the picture that the finite range of the branch covers one fundamental domain of the periodic moduli space.
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