9 research outputs found
Constraints on the pMSSM from searches for squarks and gluinos by ATLAS
We study the impact of the jets and missing transverse momentum SUSY analyses
of the ATLAS experiment on the phenomenological MSSM (pMSSM). We investigate
sets of SUSY models with a flat and logarithmic prior in the SUSY mass scale
and a mass range up to 1 and 3 TeV, respectively. These models were found
previously in the study 'Supersymmetry without Prejudice'. Removing models with
long-lived SUSY particles, we show that 99% of 20000 randomly generated pMSSM
model points with a flat prior and 87% for a logarithmic prior are excluded by
the ATLAS results. For models with squarks and gluinos below 600 GeV all models
of the pMSSM grid are excluded. We identify SUSY spectra where the current
ATLAS search strategy is less sensitive and propose extensions to the inclusive
jets search channel
Higgs and non-universal gaugino masses: no SUSY signal expected yet?
So far, no supersymmetric particles have been detected at the Large Hadron
Collider (LHC). However, the recent Higgs results have interesting implications
for the SUSY parameter space. In this paper, we study the consequences of an
LHC Higgs signal for a model with non-universal gaugino masses in the context
of SU(5) unification. The gaugino mass ratios associated with the higher
representations produce viable spectra that are largely inaccessible to the
current LHC and direct dark matter detection experiments. Thus, in light of the
Higgs results, the non-observation of SUSY is no surprise.Comment: supplementary file containing plots with log priors in ancillary
files. v2: added some comments on more general settings and references,
accepted for publication in JHE