The CMSSM and NUHM1 after LHC Run 1

O. Buchmueller, R. Cavanaugh, A. De Roeck, M. J. Dolan, J. R. Ellis, H. Flächer, S Heinemeyer, G. Isidori, J. Marrouche, D. Martinez Santos, K. A. Olive, S. Rogerson, F. J. Ronga, K. J. de Vries, G. Weiglein

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We analyze the impact of data from the full Run 1 of the LHC at 7 and 8 TeV on the CMSSM with mu > 0 and 0, incorporating the constraints imposed by other experiments such as precision electroweak measurements, flavour measurements, the cosmological density of cold dark matter and the direct search for the scattering of dark matter particles in the LUX experiment. We use the following results from the LHC experiments: ATLAS searches for events with MET accompanied by jets with the full 7 and 8 TeV data, the ATLAS and CMS measurements of the mass of the Higgs boson, the CMS searches for heavy neutral Higgs bosons and a combination of the LHCb and CMS measurements of B_s to mu+mu- and B_d to mu+mu-. Our results are based on samplings of the parameter spaces of the CMSSM for both mu>0 and mu 0 with 6.8 x 10^6, 6.2 x 10^6 and 1.6 x 10^7 points, respectively, obtained using the MultiNest tool. The impact of the Higgs mass constraint is assessed using FeynHiggs 2.10.0, which provides an improved prediction for the masses of the MSSM Higgs bosons in the region of heavy squark masses. It yields in general larger values of M_h than previous versions of FeynHiggs, reducing the pressure on the CMSSM and NUHM1. We find that the global chi^2 functions for the supersymmetric models vary slowly over most of the parameter spaces allowed by the Higgs mass and the MET searches, with best-fit values that are comparable to the chi^2/dof for the best Standard Model fit. We provide 95% CL lower limits on the masses of various sparticles and assess the prospects for observing them during Run 2 of the LHC.
Original languageEnglish
Article number2922 (2014)
Pages (from-to)1-22
Number of pages22
JournalEuropean Physical Journal C: Particles and Fields
Issue number6
Publication statusPublished - 13 Jun 2014

Bibliographical note

Accepted: 26 May 2014


  • hep-ph
  • CI Lowe Limit
  • Best-fit Point
  • CMSSM Parameter Space
  • CI Region
  • Spin-independent Dark Matter
  • Global Likelihood Function
  • Theoretical Uncertainty
  • Hadronic Matrix Element
  • Dark Matter Scattering
  • Elastic Cross Section
  • Higgs Masse
  • Higgs Mass
  • Dark Matter Constraint
  • MSSM Higgs Boson
  • Dark Matter Dendity

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