English

N=4 SYM NMHV Loop Amplitude in Superspace

High Energy Physics - Theory 2009-11-11 v3

Abstract

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)RSU(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(ΛΛΛΛ+Λ+Λ+)A(\Lambda^{-}\Lambda^{-}\Lambda^{-}\Lambda^{+}\Lambda^{+}\Lambda^{+})and all scalar A(ϕϕϕϕϕϕ)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.

Keywords

Cite

@article{arxiv.hep-th/0507117,
  title  = {N=4 SYM NMHV Loop Amplitude in Superspace},
  author = {Yu-tin Huang},
  journal= {arXiv preprint arXiv:hep-th/0507117},
  year   = {2009}
}

Comments

14 pages, 2 figures: new reference and comments added

R2 v1 2026-07-22T15:31:03.931Z