A universality in pp-waves

@article{Mukhopadhyay2007AUI,
  title={A universality in pp-waves},
  author={Partha Mukhopadhyay},
  journal={Journal of High Energy Physics},
  year={2007},
  volume={2007},
  pages={061-061}
}
We discuss a universality property of any covariant field theory in space-time expanded around pp-wave backgrounds. According to this property the space-time lagrangian density evaluated on a restricted set of field configurations, called universal sector, turns out to be same around all the pp-waves, even off-shell, with same transverse space and same profiles for the background scalars. In this paper we restrict our discussion to tensorial fields only. In the context of bosonic string theory… 

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