Killing the cMSSM softly

The European Physical Journal C

Matthias Hamer¹  José Eliel Camargo-Molina²  Ben O’Leary³  Werner Porod³  Michael Krämer⁴  Björn Sarrazin⁵  Klaus Desch⁵  Peter Wienemann⁵  Philip Bechtle⁵  Mathias Uhlenbrock⁵  Herbert K. Dreiner⁶  Tim Stefaniak⁷ 

[1] Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil;Department of Astronomy and Theoretical Physics, Lund University, 223-62, Lund, Sweden;Institut für Theoretische Physik und Astrophysik, University of Würzburg, Würzburg, Germany;Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen, Aachen, Germany;Physikalisches Institut, University of Bonn, Bonn, Germany;Physikalisches Institut, University of Bonn, Bonn, Germany;Bethe Center for Theoretical Physics, University of Bonn, Bonn, Germany;Santa Cruz Institute for Particle Physics, University of California, 95064, Santa Cruz, CA, USA;

关键词: Dark Matter;    Higgs Boson;    Higgs Mass;    Supersymmetry Breaking;    Light Supersymmetric Particle;   

DOI  :  10.1140/epjc/s10052-015-3864-0

来源: Springer

【 摘 要 】

We investigate the constrained Minimal Supersymmetric Standard Model (cMSSM) in the light of constraining experimental and observational data from precision measurements, astrophysics, direct supersymmetry searches at the LHC and measurements of the properties of the Higgs boson, by means of a global fit using the program Fittino. As in previous studies, we find rather poor agreement of the best fit point with the global data. We also investigate the stability of the electro-weak vacuum in the preferred region of parameter space around the best fit point. We find that the vacuum is metastable, with a lifetime significantly longer than the age of the Universe. For the first time in a global fit of supersymmetry, we employ a consistent methodology to evaluate the goodness-of-fit of the cMSSM in a frequentist approach by deriving p values from large sets of toy experiments. We analyse analytically and quantitatively the impact of the choice of the observable set on the p value, and in particular its dilution when confronting the model with a large number of barely constraining measurements. Finally, for the preferred sets of observables, we obtain p values for the cMSSM below 10 %, i.e. we exclude the cMSSM as a model at the 90 % confidence level.

【 授权许可】

CC BY