Generalized On-Shell Ward Identities in String Theory

  title={Generalized On-Shell Ward Identities in String Theory},
  author={Jen-Chi Lee},
  journal={Progress of Theoretical Physics},
  • Jen-Chi Lee
  • Published 1 February 1994
  • Physics
  • Progress of Theoretical Physics
It is demonstrated that an infinite set of string-tree level on-shell Ward identities, which are valid to all a-model loop orders, can be systematically constructed without referring to the string field theory. As examples, bosonic massive scattering amplitudes are calculated explicitly up to the second massive excited states. Ward identities satisfied by these amplitudes are derived by using zero-norm states in the spectrum. In particular, the inter-particle Ward identity generated by the D 2… 

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