Constrained supersymmetry after two years of LHC data: a global view with Fittino

A bstract 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 accou...

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Bibliographic Details
Published in:The journal of high energy physics 2012-06, Vol.2012 (6), Article 98
Main Authors: Bechtle, Philip, Bringmann, Torsten, Desch, Klaus, Dreiner, Herbi, Hamer, Matthias, Hensel, Carsten, Krämer, Michael, Nguyen, Nelly, Porod, Werner, Prudent, Xavier, Sarrazin, Björn, Uhlenbrock, Mathias, Wienemann, Peter
Format: Article
Language:English
Subjects:
Astronomical models
Classical and Quantum Gravitation
Constraints
Cosmology
Dark matter
Elementary Particles
Higgs bosons
High energy physics
Large Hadron Collider
Luminosity
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
Searching
String Theory
Supersymmetry
Upper bounds
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Summary:A bstract 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 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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP06(2012)098