Event Details

The so-called “golden channel”, where the Higgs boson decays in the four lepton final state via pair of Z bosons, plays a key role in the Higgs boson discovery and measurements of its properties. In this talk the emphasis is put on the Higgs boson mass and width measurements. In order to ensure the high accuracy of these measurements, the good precision of the lepton momentum determination is needed. We start from the electron reconstruction providing the details of the electron momentum estimation as well as energy scale and resolution control. These results are subsequently used in the Higgs boson mass measurements. For the Higgs boson width measurements a new method which uses the off-shell Higgs boson production is presented. The results are based on the data collected by the CMS experiment during the Run I period.