3 research outputs found
Next-to-Maximal Helicity Violating Amplitudes in Gauge Theory
Using the novel diagrammatic rules recently proposed by Cachazo, Svrcek, and
Witten, I give a compact, manifestly Lorentz-invariant form for tree-level
gauge-theory amplitudes with three opposite helicities.Comment: 12 pages, 1 figur
Supersymmetry Relations Between Contributions To One-Loop Gauge Boson Amplitudes
We apply ideas motivated by string theory to improve the calculational
efficiency of one-loop weak interaction processes with massive external gauge
bosons. In certain cases ``supersymmetry'' relations between diagrams with a
fermion loop and with a gauge boson loop hold. This is explicitly illustrated
for a particular one-loop standard model process with four-external gauge
bosons. The supersymmetry relations can be used to provide further significant
improvements in calculational efficiency.Comment: 21 pages of plain TeX + 5 PostScript figures (compressed and
uuencoded), UCLA/93/TEP/36 and DTP/93/8