Twistor and polytope interpretations for subleading color one-loop amplitudes
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2012-02-21
Autores
Nastase, Horatiu [UNESP]
Schnitzer, Howard J.
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Elsevier B.V.
Resumo
We use the relation of the one-loop subleading-color amplitudes to the one-loop n-point leading color amplitudes in N = 4 SYM, to derive a polytope interpretation for the former in the MHV case, and a representation in momentum twistor space for the general N(k) MHV case. These techniques are explored in detail for the 5-point and 6-point amplitudes. We briefly discuss the implications for IR divergences. (C) 2011 Elsevier B.V. All rights reserved.
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Nuclear Physics B. Amsterdam: Elsevier B.V., v. 855, n. 3, p. 901-926, 2012.