Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-01-03
JHEP0804:093,2008
Physics
High Energy Physics
High Energy Physics - Theory
10 pages, harvmac TeX. v2: Updated affiliation and Report-no:
Scientific paper
10.1088/1126-6708/2008/04/093
Using the pure spinor formalism we prove identities which relate the tree-level, one-loop and two-loop kinematic factors for massless four-point amplitudes. From these identities it follows that the complete supersymmetric one- and two-loop amplitudes are immediately known once the tree-level kinematic factor is evaluated. In particular, the two-loop equivalence with the RNS formalism (up to an overall coefficient) is obtained as a corollary.
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