N=4 SYM NMHV Loop Amplitude in Superspace

Details N=4 SYM NMHV Loop Amplitude in Superspace N=4 SYM NMHV Loop Amplitude in Superspace

2005-07-12

arxiv.org/abs/hep-th/0507117v3

Phys.Lett. B631 (2005) 177-186

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 2 figures: new reference and comments added

Scientific paper

10.1016/j.physletb.2005.10.012

Here we construct N=4 SuperYang-Mills 6 point NMHV loop amplitude (amplitudes with three minus helicities) as a full superspace form, using the $SU(4)_{R}$ anti-commuting spinor variables. Amplitudes with different external particle and cyclic helicity ordering are then just a particular expansion of this fermionic variable. We've verified this by explicit expansion obtaining amplitudes with two gluino calculated before. We give results for all gluino $A(\Lambda^{-}\Lambda^{-}\Lambda^{-}\Lambda^{+}\Lambda^{+}\Lambda^{+})$and all scalar $A(\phi\phi\phi\phi\phi\phi)$scattering amplitude. A discussion of using MHV vertex approach to obtain these amplitudes are given, which implies a simplification for general loop amplitudes.

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