Year: 2001
Type: article
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 for the fermionic strings. The result obtained in the latter case can be extended to the off-shell four-tachyon amplitude in type 0 theory.
Source: Modern Physics Letters A
Authors: FRANCESCO CUOMO, FRANCESCO NICODEMI, ROBERTO PETTORINO, FRANCO PEZZELLA, GIANLUCA SABELLA, RAFFAELE MAROTTA
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1987918358