Consistent off-shell tree string amplitudes
We construct off-shell tree bosonic string amplitudes, based on the operatorial formalism of the N-string vertex, with three external massless states both for open and closed strings by requiring them to be projective invariant. In particular our prescription leads, in the low-energy limit, to the t...
| Main Authors: | , , |
|---|---|
| 格式: | Journal article |
| 語言: | English |
| 出版: |
1999
|