2017/05/31 by The GAMBIT Collaboration, Peter Athron, Csaba Balázs +31 · 2 citations
Mathematics · Physics and Astronomy · #Annihilation #Chargino #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #Grand Unified Theory #Higgs boson #Large Hadron Collider #Mathematics #Minimal Supersymmetric Standard Model #Observable #Parameter space #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Statistics #Supersymmetry #astro-ph.CO #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-5167-0
50 pages, 21 figures, 7 tables, v2 accepted for publication in EPJC, v3 update Zenodo link
openalex publication_date 2017/12/01 · arxiv created 2018/10/23 · arxiv updated 2020/08/06 · openalex created_date 2020/12/07 · openalex updated_date 2026/08/06
We present the most comprehensive global fits to date of three supersymmetric models motivated by grand unification: the constrained minimal supersymmetric standard model (CMSSM), and its Non-Universal Higgs Mass generalisations NUHM1 and NUHM2. We include likelihoods from a number of direct and indirect dark matter searches, a large collection of electroweak precision and flavour observables, direct searches for supersymmetry at LEP and Runs I and II of the LHC, and constraints from Higgs observables. Our analysis improves on existing results not only in terms of the number of included observables, but also in the level of detail with which we treat them, our sampling techniques for scanning the parameter space, and our treatment of nuisance parameters. We show that stau co-annihilation is now ruled out in the CMSSM at more than 95% confidence. Stop co-annihilation turns out to be one of the most promising mechanisms for achieving an appropriate relic density of dark matter in all three models, whilst avoiding all other constraints. We find high-likelihood regions of parameter space featuring light stops and charginos, making them potentially detectable in the near future at the LHC. We also show that tonne-scale direct detection will play a largely complementary role, probing large parts of the remaining viable parameter space, including essentially all models with multi-TeV neutralinos.