64 citations · 661 across the 48 of their papers we have counts for
49 papers
Dirac-Born-Infeld action from inequivalent representations of open strings
Isao Kishimoto, Tomohiko Takahashi, Ayane Tezuka
We study open strings in a constant magnetic field from the viewpoint of universal canonical variables. Using a conserved Klein-Gordon-type pairing, we show that the canonical comm…
Graviton vertex operators in the de Donder gauge and BRST descent
Isao Kishimoto, Tomohiko Takahashi, Mamiko Yamada
We revisit the role of the trace sector of the graviton in covariant string amplitudes by constructing the ghost-number-three graviton vertex operator via BRST descent, imposing on…
Vertex Operators in Superstring Theory from Integral Forms and Descent Equations
Isao Kishimoto, Shigenori Seki, Haruka Shimogaki +1
We develop a geometric formulation of vertex operators in superstring theory based on integral forms on super Riemann surfaces. Starting from the integrated NS-NS vertex operator,…
Two-point closed string amplitudes in the BRST formalism
Isao Kishimoto, Shigenori Seki, Tomohiko Takahashi
Two-point tree-level amplitudes in bosonic closed string theory are described by a correlation function within the BRST formalism, which respects manifest Lorentz and conformal inv…
Closed string vertex operators with various ghost number
Isao Kishimoto, Mako Kouga, Shigenori Seki +1
We construct closed string vertex operators with various ghost numbers in addition to the conventional ones, using the Faddeev-Popov procedure for the gauge fixing of the conformal…
On the spectrum around numerical solutions in Siegel gauge in open string field theory
Isao Kishimoto
In bosonic open string field theory, the spectrum around the numerical tachyon vacuum solution in Siegel gauge was investigated by Giusto and Imbimbo. Using their numerical method,…