TY  - JOUR
A1  - Bechtle, Philip
A1  - Bringmann, Torsten
A1  - Desch, Klaus
A1  - Dreiner, Herbi
A1  - Hamer, Matthias
A1  - Hensel, Carsten
A1  - Krämer, Michael
A1  - Nguyen, Nelly
A1  - Porod, Werner
A1  - Prudent, Xavier
A1  - Sarrazin, Björn
A1  - Uhlenbrock, Mathias
A1  - Wienemann, Peter
T1  - Constrained supersymmetry after two years of LHC data: a global view with Fittino
JF  - Journal of High Energy Physics
N2  - 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 B(B\(_s\)→μμ) 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.
KW  - supersymmetry phenomenology
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-129573
VL  - 06
IS  - 098
ER  - 
TY  - JOUR
A1  - Bechtle, Philip
A1  - Camargo-Molina, José Eliel
A1  - Desch, Klaus
A1  - Dreiner, Herbert K.
A1  - Hamer, Matthias
A1  - Krämer, Michael
A1  - O'Leary, Ben
A1  - Porod, Werner
A1  - Sarrazin, Björn
A1  - Stefaniak, Tim
A1  - Uhlenbrock, Mathias
A1  - Wienemann, Peter
T1  - Killing the cMSSM softly
JF  - The European Physical Journal C
N2  - 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.
KW  - Dark Matter
KW  - Higgs Boson
KW  - Higgs Mass
KW  - Supersymmetry Breaking
KW  - Light Supersymmetric Particle
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-165045
VL  - 76
IS  - 96
ER  -