On Tuesday, March 9, at 9am, Dr. Sijing Zhang will present a seminar entitled “Search for an additional low mass Higgs boson in the diphoton final state with the CMS experiment”. Connecting information is available here: https://indico.cern.ch/event/1015484/
The CMS and ATLAS experiments at the LHC have announced the discovery of a Higgs boson with mass at approximately 125 GeV in the search for the Standard Model Higgs boson via, notably, the γγ and ZZ to four leptons final states. However, physics beyond the SM (BSM) can also provide a Higgs boson that is compatible with the observed 125 GeV boson, as well as additional Higgs bosons, some of which could have masses below 125 GeV. This motivates the extension of the search at the LHC for the Higgs boson h1 in the diphoton final state. The H→γγγγ decay channel provides a clean final-state topology that allows the mass of a Higgs boson in the search range to be reconstructed with high precision. With 13 TeV data of 132 fb-1 integrated luminosity, a search for a new resonance decaying into two photons is performed on CMS, for the diphoton invariant mass range between 70 and 110 GeV. The expected 95% confidence level upper limits on the product of the cross-section with the branching ratio into two photons are presented.
