Marginal deformations in string field theory

@article{Fuchs2007MarginalDI,
  title={Marginal deformations in string field theory},
  author={Ehud Fuchs and Michael Kroyter and Robertus Potting},
  journal={Journal of High Energy Physics},
  year={2007},
  volume={2007},
  pages={101-101}
}
We describe a method for obtaining analytic solutions corresponding to exact marginal deformations in open bosonic string field theory. For the photon marginal defor- mation we have an explicit analytic solution to all orders. Our construction is based on a pure gauge solution where the gauge field is not in the Hilbert space. We show that the solution itself is nevertheless perfectly regular. We study its gauge transformations and cal- culate some coefficients explicitly. Finally, we discuss… 
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