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...
Autori principali: | Liccardo, A, Pezzella, F, Marotta, R |
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Natura: | Journal article |
Lingua: | English |
Pubblicazione: |
1999
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