Abstract
Abstract In the recent years new interest has arised in determining the Superstring Theory corrections to the Yang-Mills lagrangian. For a long time only the O (α′ 2 ) terms were known, together with some partial knowledge of the O (α′ 3 ) ones. On this contribution we report in the recent progress on this subject, carried over in the last two years, emphasizing the scattering amplitude approach and the recent calculation of the five-point amplitude.
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