Asymptotic Helicity Conservation in SUSY

TL;DR

This paper discusses the proof and implications of asymptotic helicity conservation in supersymmetric models, showing it holds at high energies and may influence lower-energy processes involving SUSY particles.

Contribution

It extends the helicity conservation theorem to SUSY models and explores its potential effects at energies near the SUSY scale.

Findings

Helicity is conserved in two-to-two SUSY processes at high energies.

The theorem is exact asymptotically but may impact lower-energy phenomena.

Analysis includes electroweak and gluon fusion processes involving Higgs and gauge bosons.

Abstract

We summarize the extensive work started in ref.1, according to which total helicity is conserved for any two-to-two process, at sqrt{s} larger than M_{SUSY} and fixed angles, in any SUSY extension of SM. Asymptotically the theorem is exact. But it may also have important implications at lower energies sqrt{s} close to M_{SUSY}. Up to now, these have been investigated to 1loop electroweak (EW) order for the processes ug to d W+, sd_L chi+; as well as the 17 gg to HH', and the 9 gg to VH processes, where H,H' denote Higgs or Goldstone bosons, and V=Z, W.