Abstract
Abstract We 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 B s → 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.
Highlights
Matter (DM) density in the Universe [5] can be explained by a stable neutralino lightest supersymmetric particle (LSP), acting as a weakly interacting massive particle (WIMP) [6]
We find that the description of the low-energy observables, (g − 2)μ in particular, and the non-observation of SUSY at the Large Hadron Collider (LHC) become more and more incompatible within the Constrained Minimal Supersymmetric Standard Model (CMSSM)
We have presented a global fit of the constrained Minimal Supersymmetric Standard Model (MSSM) and a non-universal Higgs mass model (NUHM1) to low-energy precision measurements, dark matter observables and, in particular, current LHC exclusion limits from direct SUSY searches in the zero-lepton plus jets and missing transverse energy channel
Summary
We give an overview of the codes and methods used for the global fits of the CMSSM and NUHM1 models. An overview over the codes used for scanning the parameter space and predicting the observables is given, followed by an explanation of the statistical methods used to derive the results
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