Twistor and polytope interpretations for subleading color one-loop amplitudes

Nastase, Horatiu [UNESP]Schnitzer, Howard J.2013-09-302014-05-202013-09-302014-05-202012-02-21Nuclear Physics B. Amsterdam: Elsevier B.V., v. 855, n. 3, p. 901-926, 2012.0550-3213http://hdl.handle.net/11449/24337We 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.901-926engTwistor and polytope interpretations for subleading color one-loop amplitudesArtigo10.1016/j.nuclphysb.2011.10.029WOS:000298072600015Acesso restrito