August 28, 2011 to September 2, 2011
US/Central timezone
Slides available on Indico -- there are no formal proceedings

A multi-step Fitting Approach to the allowed Parameter Space of the Constrained Minimal Supersymmetric Model and Comparison with the newest LHC Results

Aug 30, 2011, 3:00 PM
B: Curia II, Wilson Hall 2SW

B: Curia II, Wilson Hall 2SW

SUSY: models Parallel Session 6


Ms Conny Beskidt (IEKP, KIT)


We study the strong correlations between the parameters of the popular Constrained Minimal Supersymmetric Model (CMSSM) with four independent parameters. Knowing these correlations allows to develop a multi-step fitting procedure, which efficiently determines the allowed parameter space by simply minimizing the chi^2 in multiple steps, i.e. first the parameters with the highest correlation are determined. The data included in the fit are the relic density, the b-physics observables, the anomalous magnetic moment of the muon, upper limits on direct neutralino-nucleon scattering cross sections and lower limits on Higgs and sparticle masses from LEP and newest LHC data. With this new fitting method and including non-Gaussian systematic errors we find a significantly larger allowed parameter region than previous methods based on random or Markov Chain sampling of the parameter space.

Primary authors

Ms Conny Beskidt (IEKP, KIT) Prof. Dmitri Kazakov (Dubna, JINR & Moscow, ITEP) Dr Eva Ziebarth (IEKP, KIT) Dr Valery Zhukov (IEKP, KIT) Prof. Wim de Boer (IEKP, KIT)

Presentation materials