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Measurements of Higgs boson production and properties in the ZZ decay channel using the CMS detector

S. Regnard, on behalf of the CMS collaboration

in 38th International Conference on High Energy Physics

Contribution: pdf


Measurements of Higgs boson properties using the $\text{H}\to\text{ZZ}\to4\ell$ ($\ell=\text{e},\mu$) decay channel are presented, based on a data sample corresponding to an integrated luminosity of $12.9\,\text{fb}^\text{$-$1}$ of pp collisions at a center-of-mass energy of $13\,\text{TeV}$ collected by the CMS experiment at the LHC during 2016. The observed significance for the standard model Higgs boson is $6.2\sigma$ at a mass of $m_\text{H}=125.09\,\text{GeV}$, where the expected significance is $6.5\sigma$. The signal strength $\mu$, defined as the ratio of the Higgs boson production cross section times branching fraction to four leptons to the standard model expectation, is measured to be $\mu=0.99^{+0.33}_{-0.26}$. Individual strength parameters for four Higgs boson production modes are constrained for the first time using this channel. The Higgs boson mass is measured to be $m_\text{H}=124.50^{+0.48}_{-0.46}\,\text{GeV}$. The model-independent fiducial cross section is measured to be $2.29^{+0.74}_{-0.64}({\rm stat.})^{+0.30}_{-0.23}({\rm sys.})^{+0.01}_{-0.05}({\rm model~dep.})\,\text{fb}$, and differential cross sections as a function of the transverse momentum of the Higgs boson and the number of associated jets are measured.