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

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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.

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Authors and Affiliations

  1. Institute of Physics AS CR, Na Slovance 2, Prague 8, Czech Republic

    Matěj Kudrna & Martin Schnabl

  2. Institute of Physics, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan

    Toru Masuda & Yuji Okawa

  3. Ministry of Internal Affairs and Communications, 2-1-2 Kasumigaseki, Chiyoda-ku, Tokyo, 100-8926, Japan

    Kenichiro Yoshida

Authors
  1. Matěj Kudrna
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  2. Toru Masuda
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  3. Yuji Okawa
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  4. Martin Schnabl
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  5. Kenichiro Yoshida
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Corresponding author

Correspondence to Martin Schnabl.

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ArXiv ePrint: 1207.3335

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Kudrna, M., Masuda, T., Okawa, Y. et al. Gauge-invariant observables and marginal deformations in open string field theory. J. High Energ. Phys. 2013, 103 (2013). https://doi.org/10.1007/JHEP01(2013)103

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  • DOI: https://doi.org/10.1007/JHEP01(2013)103

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