Implications of LHC Searches on SUSY Particle Spectra: The pMSSM Parameter Space with Neutralino Dark Matter

TL;DR

This paper evaluates how LHC searches constrain the 19-parameter pMSSM, focusing on neutralino dark matter, by analyzing the impact on SUSY particle spectra and comparing collider and dark matter detection constraints.

Contribution

It provides a comprehensive analysis of the pMSSM parameter space using LHC data, including validation of simulation and comparison with dark matter experiments.

Findings

LHC searches exclude a significant fraction of pMSSM points with certain SUSY particle masses.

The study identifies regions of parameter space compatible with all constraints, including dark matter detection.

Higgs production cross sections are suppressed in some allowed MSSM scenarios.

Abstract

We study the implications of LHC searches on SUSY particle spectra using flat scans of the 19-parameter pMSSM phase space. We apply constraints from flavour physics, g_mu-2, dark matter and earlier LEP and Tevatron searches. The sensitivity of the LHC SUSY searches with jets, leptons and missing energy is assessed by reproducing with fast simulation the recent CMS analyses after validation on benchmark points. We present results in terms of the fraction of pMSSM points compatible with all the constraints which are excluded by the LHC searches with 1 fb^{-1} and 15 fb^{-1} as a function of the mass of strongly and weakly interacting SUSY particles. We also discuss the suppression of Higgs production cross sections for the MSSM points not excluded and contrast the region of parameter space tested by the LHC data with the constraints from dark matter direct detection experiments.