Constrained supersymmetry after two years of LHC data: a global view with Fittino
By Philip Bechtle, T. Bringmann, K. Desch, H. Dreiner, M. Hamer, C. Hensel, Michael Krämer, N. Nguyen, Werner Porod, X. Prudent and 3 more. 2012
132 citations recorded by the source corpus.
A bstractWe perform global fits to the parameters of the Constrained Minimal Super-symmetric Standard Model (CMSSM) and to a variant with non-universal Higgs masses (NUHM1). In addition to constraints from low-energy precision observables and the cosmological dark matter density, we take into account the LHC exclusions from searches in jets plus missing transverse energy signatures with about 5 fb−1 of integrated luminosity. We also include the most recent upper bound on the branching ratio Bs → μμ from LHCb. Furthermore, constraints from and implications for direct and indirect dark matter searches are discussed. The best fit of the CMSSM prefers a light Higgs boson just above the experimentally excluded mass. We find that the description of the low-energy observables, (g − 2)μ in particular, and the non-observation of SUSY at the LHC become more and more incompatible within the CMSSM. A potential SM-like Higgs boson with mass around 126 GeV can barely be accommodated. Values for $ \mathcal{B}\left( {{B_{\text{s}}} \to \mu \mu } \right) $ just around the Standard Model prediction are naturally expected in the best fit region. The most-preferred region is not yet affected by limits on direct WIMP searches, but the next generation of experiments will probe this region. Finally, we discuss implications from fine-tuning for the best fit regions.
Subfields: Artificial Intelligence, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/5c710f162635fdf6a4db616508e027a8d646e227
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Citations in the corpus
- Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects (2012, background): “y observables (g − 2 in particular) do favor new physics contributions not too far above 100GeV [8]. While this tension starts to considerably disfavor very constrained models of, e.g., supersymmetry [9], it may simply be an indication that the new physics sector which the WIMP belongs to appears at”