Gauge-invariant observables and marginal deformations in open string field theory
Abstract
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.
Keywords
Cite
@article{arxiv.1207.3335,
title = {Gauge-invariant observables and marginal deformations in open string field theory},
author = {Matej Kudrna and Toru Masuda and Yuji Okawa and Martin Schnabl and Kenichiro Yoshida},
journal= {arXiv preprint arXiv:1207.3335},
year = {2013}
}
Comments
27 pages, 15 figures; v2: references added, minor changes, version published in JHEP