Abstract
Searches for a high-mass Higgs boson decaying into WW and ZZ channels have been carried out using data collected at centre-of-mass energies of 7 and 8 TeV at the LHC collider, corresponding to integrated luminosities of about 5 fb−1 and 20 fb−1, respectively. Many different final states have been considered and upper limits on the Higgs boson production cross section have been derived. The results are interpreted in a BSM model containing an additional electroweak singlet.
Highlights
The standard model (SM) of electroweak interactions [1, 2, 3], the most complete theory describing the interactions between fundamental particles, has been successfully tested during several decades
The existence of a scalar particle, the Higgs boson (h), associated with the field responsible for spontaneous electroweak symmetry breaking [4, 5, 6, 7, 8, 9], seems to have been confirmed by the observation of a new boson, whose properties match those expected for a SM Higgs, with a mass of approximately 125 GeV/c2, as reported by the ATLAS and CMS Collaborations [10, 11]
There is still a possibility that the newly discovered particle has no connection or partial connection to the electroweak symmetry breaking mechanism [22, 23]. This includes several popular scenarios, as it is the case of general two-Higgs-doublet models or models in which the SM Higgs boson mixes with a heavy electroweak singlet [26], which predict the existence of additional resonances at high mass, with couplings similar to the SM Higgs boson
Summary
The standard model (SM) of electroweak interactions [1, 2, 3], the most complete theory describing the interactions between fundamental particles, has been successfully tested during several decades. The existence of a scalar particle, the Higgs boson (h), associated with the field responsible for spontaneous electroweak symmetry breaking [4, 5, 6, 7, 8, 9], seems to have been confirmed by the observation of a new boson, whose properties match those expected for a SM Higgs, with a mass of approximately 125 GeV/c2, as reported by the ATLAS and CMS Collaborations [10, 11]. We interpret the results in the heavy electroweak singlet scenario, where the heavy resonance contributes to electroweak symmetry breaking, and has similar properties to the SM Higgs boson with modifications to its width and allowing for non-SM-like Higgs decay modes These searches are performed using the data collected by the CMS experiment at centre-of-mass energies of 7 and 8 TeV at the LHC collider, corresponding to integrated luminosities of about 5 fb−1 and 20 fb−1, respectively. Afterwards, we discuss the combination and the future plans for these searches
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