Interpreting LHC Higgs Results from Natural New Physics Perspective

Abstract

We analyze the 2011 LHC Higgs data in the context of simplified new physics models addressing the naturalness problem. These models are expected to contain new particles with sizable couplings to the Higgs boson, which can easily modify the Higgs production cross sections and branching fractions. We focus on searches in the Higgs to 4 leptons and Higgs to diphoton channels, in the latter case including the vector boson fusion production mode. Combining the available ATLAS and CMS data in these channels, we derive constraints on an effective low-energy theory of the Higgs boson. We then map several simplified scenarios to the effective theory, capturing numerous natural new physics models such as supersymmetry and Little Higgs, and extract the constraints on the corresponding parameter space. We show that simple models where one fermionic or one scalar partner is responsible for stabilizing the Higgs potential are already constrained in a non-trivial way by LHC Higgs data.

26 pages, 9 figures; v2: small changes in the analysis, figures and typos fixed, references added; v3: plots and discussion updated

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• Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV
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• Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC
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• Interpreting the LHC Higgs Search Results in the MSSM
• Implications of a 125 GeV Higgs for the MSSM and Low-Scale SUSY Breaking
• Model-Independent Bounds on a Light Higgs
• A Higgs boson near 125 GeV with enhanced di-photon signal in the NMSSM
• NMSSM Higgs Benchmarks Near 125 GeV
• Search for the Standard Model Higgs boson in the diphoton decay channel with 4.9 fb-1 of pp collisions at sqrt(s) = 7 TeV with ATLAS
• Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
• Implications of the 125 GeV Higgs boson for scalar dark matter and for the CMSSM phenomenology
• Fingerprinting Higgs Suspects at the LHC
• The Baryogenesis Window in the MSSM
• Current experimental constraints on the lightest Higgs boson mass in the constrained MSSM
• The constrained NMSSM and Higgs near 125 GeV
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• A Non Standard Model Higgs at the LHC as a Sign of Naturalness
• On Naturalness of the MSSM and NMSSM
• Search for the standard model Higgs boson decaying to a W pair in the fully leptonic final state in pp collisions at sqrt(s) = 7 TeV
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• What if the Higgs couplings to W and Z bosons are larger than in the Standard Model?
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• Minimal violation of flavour and custodial symmetries in a vectophobic Two-Higgs-Doublet-Model
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