Abstract
Studies of the Higgs boson spin and parity are presented using data samples corresponding to the γγ, ZZ, and WW decay channels. The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of approximately 5 fb-1 and 20 fb-1, respectively. The data are compared to the expectations for the standard model Higgs boson, and for several alternative models.
Highlights
The observation of a new boson [1, 2] with a mass around 125 GeV and properties consistent with the standard model (SM) Higgs boson was reported by the ATLAS and CMS Collaborations in 2012
The discovery was followed by an extensive set of measurements of its properties to determine if they follow the SM predictions or if there are indications for physics beyond the SM (BSM)
The other terms in the SM can be generated through loop effects, and are expected to be small to be observed with the current LHC dataset, they are considered as anomalous couplings
Summary
The observation of a new boson [1, 2] with a mass around 125 GeV and properties consistent with the standard model (SM) Higgs boson was reported by the ATLAS and CMS Collaborations in 2012. The discovery was followed by an extensive set of measurements of its properties to determine if they follow the SM predictions or if there are indications for physics beyond the SM (BSM). The decays of this boson into two electroweak (EW) gauge bosons, H → ZZ → 4 , H → WW → ν ν, H → γγ, can provide information on the consistency of its spin-parity with the hypothesis of a spin-zero scalar SM Higgs boson. The full Run LHC data sample collected by CMS experiment [3] at centre-of-mass energies of 7 and 8 TeV is used
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