• DOI:10.1143/ptp/91.2.353
• Corpus ID: 119063288

Generalized On-Shell Ward Identities in String Theory

@article{Lee1994GeneralizedOW,
  title={Generalized On-Shell Ward Identities in String Theory},
  author={Jen-Chi Lee},
  journal={Progress of Theoretical Physics},
  year={1994},
  volume={91},
  pages={353-360}
}

• 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 ⊗ D 2' zero-norm state at the second massive level is demonstrated. The four physical propagating states of this mass level are then shown to form a large gauge multiplet. This result justifies our previous consideration on higher inter-spin symmetry from the generalized worldsheet σ-model point of view