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

0423576 - FZÚ 2014 RIV US eng J - Článek v odborném periodiku
Kudrna, Matěj - Masuda, T. - Okawa, Y. - Schnabl, Martin - Yoshida, K.
Gauge-invariant observables and marginal deformations in open string field theory.
Journal of High Energy Physics. Roč. 2013, č. 1 (2013), s. 1-26. ISSN 1126-6708
Grant CEP: GA MŠMT(CZ) LH11106
Grant ostatní: EUROHORC and ESF(XE) EYI/07/E010
Institucionální podpora: RVO:68378271
Klíčová slova: string field theory * tachyon condensation * D-branes
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 5.618, rok: 2012

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.
Trvalý link: http://hdl.handle.net/11104/0229705