Off-shell tachyon amplitudes: analyticity and projective invariance
High Energy Physics - Theory
2009-10-31 v1
Abstract
We compute off-shell three- and four-tachyon amplitudes at tree level by using a prescription based on the requirement of projective invariance. In particular we show that the off-shell four-tachyon amplitude can be put in the same form as the corresponding on-shell one, exhibiting therefore the same analyticity properties. This is shown both for the bosonic and the fermionic string. The result obtained in the latter case can be extended to the off-shell four-tachyon amplitude in type 0 theory.
Keywords
Cite
@article{arxiv.hep-th/0011071,
title = {Off-shell tachyon amplitudes: analyticity and projective invariance},
author = {F. Cuomo and R. Marotta and F. Nicodemi and R. Pettorino and F. Pezzella and G. Sabella},
journal= {arXiv preprint arXiv:hep-th/0011071},
year = {2009}
}
Comments
17 pages