# LHC limits on gluinos and squarks in the minimal Dirac gaugino model

## TL;DR

This paper analyzes how the presence of Dirac gauginos in the minimal Dirac gaugino model affects LHC search limits for gluinos and squarks, highlighting the impact of electroweak-ino spectrum assumptions and the trilinear coupling on mass bounds.

## Contribution

It provides a detailed comparison of LHC gluino and squark mass limits within the minimal Dirac gaugino model under various electroweak-ino spectrum assumptions and the influence of the trilinear coupling.

## Key findings

- Large λ_S weakens gluino and squark mass limits.
- Electroweak-ino spectrum assumptions significantly affect search constraints.
- Limits differ from those in the MSSM scenario.

## Abstract

Dirac gauginos are a well-motivated extension of the MSSM, leading to interesting phenomenological consequences. At the LHC, gluino-pair production is enhanced while squark production is suppressed as compared to the MSSM, and the decay signatures are altered by a more complex chargino and neutralino spectrum. We investigate how this impacts current gluino and squark mass limits from Run~2 of the LHC. Concretely, we compare different assumptions about the electroweak-ino spectrum through four benchmark models paying particular attention to the effect of the trilinear $\lambda_S$ coupling, which induces a mass splitting between the mostly bino/U(1) adjoint states. Among other results, we show that for large $\lambda_S$ the additional $\tilde\chi^0_2\to f\bar f \tilde\chi^0_1$ decays somewhat weaken the limits on gluinos (squarks) in the case of heavy squarks (gluinos). Moreover, we compare the limits in the gluino vs. squark mass plane to those obtained in equivalent MSSM scenarios.