Prof. Upul Sonnadara
Department of Physics
CMS Publications
Measurement of the inclusive cross sections for W and Z boson production in proton-proton collisions at √s= 5.02 and 13 TeV
Overview of high-density QCD studies with the CMS experiment at the LHC
Review of top quark mass measurements in CMS
Search for Fractionally Charged Particles in Proton-Proton Collisions at √𝑠=13 TeV
Test of lepton flavor universality in semileptonic Bc+ meson decays in proton-proton collisions at √s = 13 TeV
Differential cross section measurements for the production of top quark pairs and of additional jets using dilepton events from pp collisions at √s = 13 TeV
Measurement of inclusive and differential cross sections for W+W− production in proton-proton collisions at √s = TeV
Search for resonant pair production of Higgs bosons in the bbbb final state using large-area jets in proton-proton collisions at √s = 13 TeV
Girth and groomed radius of jets recoiling against isolated photons in lead-lead and proton-proton collisions at √s = 5.02 TeV
Search for New Resonances Decaying to Pairs of Merged Diphotons in Proton-Proton Collisions at √s= 13 TeV
Measurement of multidifferential cross sections for dijet production in proton–proton collisions at √s = 13 TeV
Search for charged-lepton flavor violation in the production and decay of top quarks using trilepton final states in proton-proton collisions at √s = 13 TeV
Search for a standard model-like Higgs boson in the mass range between 70 and 110 GeV in the diphoton final state in proton-proton collisions at √s= 13TeV
Measurement of the double-differential inclusive jet cross section in proton-proton collisions at √s = 5.02 TeV
Observation of triple J/ψ meson production in proton-proton collisions
Nuclear modification of Y states in pPb collisions at sNN= 5.02 TeV
Search for new particles in an extended Higgs sector with four b quarks in the final state at s= 13TeV
Measurements of the associated production of a W boson and a charm quark in proton–proton collisions at √s=8TeV
Evidence for WW/WZ vector boson scattering in the decay channel ℓνqq produced in association with two jets in proton-proton collisions at √s=13 TeV
Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
Since the discovery of the Higgs boson in 2012, detailed studies of its properties have been ongoing. Besides its mass, its width—related to its lifetime—is an important parameter. One way to determine this quantity is to measure its off-shell production, where the Higgs boson mass is far away from its nominal value, and relating it to its on-shell production, where the mass is close to the nominal value. Here we report evidence for such off-shell contributions to the production cross-section of two Z bosons with data from the CMS experiment at the CERN Large Hadron Collider. We constrain the total rate of the off-shell Higgs boson contribution beyond the Z boson pair production threshold, relative to its standard model expectation, to the interval [0.0061, 2.0] at the 95% confidence level. The scenario with no off-shell contribution is excluded at a p-value of 0.0003 (3.6 standard deviations). We measure the width of the Higgs boson as ΓH=3.2+2.4−1.7MeV, in agreement with the standard model expectation of 4.1 MeV. In addition, we set constraints on anomalous Higgs boson couplings to W and Z boson pairs.