218 research outputs found
Comments on Takahashi-Tanimoto's scalar solution
We study the identity-based solution of Witten's cubic bosonic open string
field theory constructed by Takahashi and Tanimoto, which is claimed to
describe the tachyon vacuum. We argue that the observables of the solution
coincide with those of the tachyon vacuum using the method proposed by
Kishimoto and Takahashi. We also discuss how to treat the kinetic term of the
string field theory expanded around it.Comment: 25 pages, 4 figures, v3: several clarifications added, corrected
statements about operator U, v4: comments on operator U_k are adde
Multiloop Amplitudes of Light-cone Gauge Superstring Field Theory: Odd Spin Structure Contributions
We study the odd spin structure contributions to the multiloop amplitudes of
light-cone gauge superstring field theory. We show that they coincide with the
amplitudes in the conformal gauge with two of the vertex operators chosen to be
in the pictures different from the standard choice, namely (-1,-1) picture in
the type II case and -1 picture in the heterotic case. We also show that the
contact term divergences can be regularized in the same way as in the
amplitudes for the even structures and we get the amplitudes which coincide
with those obtained from the first-quantized approach.Comment: 32 pages, 2 figure
Light-cone Gauge String Field Theory and Dimensional Regularization
We review our recent proposals to dimensionally regularize the light-cone
gauge string field theory.Comment: 10 pages, 5 figures, A contribution to the proceedings of "SFT2010",
held at YITP, Kyoto, Japan, October 18-22, 201
- …