HEE Seminar: "VBS Signatures to explore the Higgs couplings at the LHC" (Leonardo Giannini, UCSD)

  • Starts: 3:30 pm on Thursday, April 18, 2024
  • Ends: 4:30 pm on Thursday, April 18, 2024
Since the discovery of the Higgs (H) boson by the ATLAS and CMS Collaborations in 2012, various measurements of its properties have been performed. The direct coupling of the Higgs boson to the vector bosons, the top quark, the bottom quark, the tau lepton and the muon have all been established over time. It has also been proven that the Higgs boson is indeed a scalar particle. All measurements made so far are found to be consistent with the expectations of the Standard Model (SM). As more data is being collected, the focus shifts both to better precision and rare processes, in order to improve our understanding of the Higgs sector. Among the rare processes, we examine the production of a vector boson and a Higgs boson (VH) or of two vector bosons and a Higgs boson (VVH) via vector boson scattering (VBS). Both are very rare processes in the SM, however, but they are sensitive to deviations from the SM expectations. The VBS VH production allows to probe directly the relative sign of the couplings to the W and the Z bosons, while the VBS VVH production can be sensitive to the HHH trilinear coupling and in particular to the VVHH quartic coupling. An overview of the ongoing analysis effort with the CMS Run 2 data and of both the public and expected results is given.
PRB 595
Leonardo Giannini
Daniel Spitzbart