Constraining CP-violating Higgs Sectors at the LHC using gluon fusion

Abstract

We investigate the constraints that the LHC can set on a 126 GeV Higgs boson that is an admixture of CP eigenstates. Traditional analyses rely on Higgs couplings to massive vector bosons, which are suppressed for CP-odd couplings, so that these analyses have limited sensitivity. Instead we focus on Higgs production in gluon fusion, which occurs at the same order in the strong coupling for both CP-even and -odd couplings. We study the Higgs plus two jet final state followed by Higgs decay into a pair of tau leptons. We show that using the 8 TeV dataset it is possible to rule out the pure CP-odd hypothesis in this channel alone at nearly 95\% C.L, assuming that the Higgs is CP-even. We also provide projected limits for the 14 TeV LHC run.

10 pages, 4 figures

References in corpus (15)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• Event generation with SHERPA 1.1
• A standard format for Les Houches Event Files
• VBFNLO: A parton level Monte Carlo for processes with electroweak bosons
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Aspects of CP violation in the HZZ coupling at the LHC
• Determining the CP parity of Higgs bosons at the LHC in their tau decay channels
• Resolving the Higgs-Gluon Coupling with Jets
• Monte Carlo studies of the jet activity in Higgs + 2 jet events
• Higgs CP Properties From Early LHC Data
• Measuring spin and CP from semi-hadronic ZZ decays using jet substructure
• Boosting Higgs discovery - the forgotten channel
• Pseudoscalar Higgs Bosons at the LHC: Production and Decays into Electroweak Gauge Bosons Revisited

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• Machine learning the Higgs boson-top quark CP phase
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• Implications of CP-violating Top-Higgs Couplings at LHC and Higgs Factories
• Approaching robust EFT limits for CP-violation in the Higgs sector
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• Returning CP-Observables to The Frames They Belong
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• Perturbative Higgs CP violation, unitarity and phenomenology
• Complementarity of LHC and EDMs for Exploring Higgs CP Violation
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• Determination of the Higgs CP-mixing angle in the tau decay channels
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