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We give a simple prescription for computing, in the framework of the bosonic string theory, off-shell one-loop amplitudes with any number of external massless particles, for both the open and closed strings. We discuss their properties and, in particular, for the two-string one-loop amplitudes, we show their transversality.

Original publication

DOI

10.1142/S021773239800259X

Type

Journal article

Journal

Modern Physics Letters A

Publication Date

28/09/1998

Volume

13

Pages

2433 - 2443