Supersymmetry in light of 1/fb of LHC data

We update previous frequentist analyses of the CMSSM and NUHM1 parameter spaces to include the public results of searches for supersymmetric signals using ∼1/fb of LHC data recorded by ATLAS and CMS and ∼0.3/fb of data recorded by LHCb in addition to electroweak precision and B-physics observables. We also include the constraints imposed by the cosmological dark matter density and the XENON100 search for spin-independent dark matter scattering. The LHC data set includes ATLAS and CMS searches for jets + Open image in new window events and for the heavier MSSM Higgs bosons, and the upper limits on BR(B s →μ + μ −) from LHCb and CMS. The absences of jets + Open image in new window signals in the LHC data favour heavier mass spectra than in our previous analyses of the CMSSM and NUHM1, which may be reconciled with (g−2) μ if tanβ∼40, a possibility that is, however, under pressure from heavy Higgs searches and the upper limits on BR(B s →μ + μ −). As a result, the p-value for the CMSSM fit is reduced to ∼15(38)%, and that for the NUHM1 to ∼16(38)%, to be compared with ∼9(49)% for the Standard Model limit of the CMSSM for the same set of observables (dropping (g−2) μ ), ignoring the dark matter relic density. We discuss the sensitivities of the fits to the (g−2) μ and BR(b→sγ) constraints, contrasting fits with and without the (g−2) μ constraint, and combining the theoretical and experimental errors for BR(b→sγ) linearly or in quadrature. We present predictions for mg~, BR(B s →μ + μ −), M h and M A , and update predictions for spin-independent dark matter scattering, incorporating the uncertainty in the π-nucleon σ term Σ πN . Finally, we present predictions based on our fits for the likely thresholds for sparticle pair production in e + e − collisions in the CMSSM and NUHM1.
The European Physical Journal C, 72 (2)
ISSN:1434-6044
ISSN:1434-6052