Gluino Polarization at the LHC

TL;DR

This paper investigates gluino polarization and spin correlations at the LHC, showing how these properties influence observable distributions in gluino pair production and single gluino production processes.

Contribution

It provides theoretical predictions for gluino polarization and spin correlations, highlighting their effects on final-state distributions in LHC events.

Findings

Non-zero spin-spin correlations in gluino pairs.

Gluino polarization affects energy and angular distributions.

Predicted non-zero polarization in super-Compton processes.

Abstract

Gluinos are produced pairwise at the LHC in quark-antiquark and gluon-gluon collisions: $qqbar,gg \to \tilde{g} \tilde{g}$. While the individual polarization of gluinos vanishes in the limit in which the small mass difference between L and R squarks of the first two generations is neglected, non-zero spin-spin correlations are predicted within gluino pairs. If the squark/quark charges in Majorana gluino decays are tagged, the spin correlations have an impact on the energy and angular distributions in reconstructed final states. On the other hand, the gluino polarization in single gluino production in the supersymmetric Compton process $g q \to \tilde{g} \tilde{q}_{R,L}$ is predicted to be non-zero, and the polarization affects the final-state distributions in super-Compton events.