EPSHEP21

Abstracts

The CLIC potential for new physics

• Speaker: Jan Klamka
• Status: accepted for an oral presentation (12+3)
• Abstract: The Compact Linear Collider (CLIC) is a mature option for a future electron-positron collider operating at centre-of-mass energies of up to 3 TeV. CLIC would be built and operated in a staged approach with three centre-of-mass energy stages currently assumed to be 380 GeV, 1.5 TeV, and 3 TeV. A selection of results from recent studies will be presented showing that CLIC has excellent sensitivity to many BSM physics scenarios. New particles can be discovered in a model-independent way almost up to the kinematic limit. Compared with hadron colliders, the low background conditions at CLIC provide extended discovery potential, in particular for the production through electroweak and/or Higgs boson interactions. This includes scenarios with extended scalar sectors, also motivated by dark matter, which can be searched for using associated production processes or cascade decays involving electroweak gauge bosons.

Higgs and double Higgs production at CLIC e+e- energies up to 3 TeV

• Speaker: Rickard Stroem
• Status: accepted for an oral presentation (14+3)
• Abstract: The Compact Linear Collider (CLIC) is a mature option for a future electron-positron collider operating at centre-of-mass energies of up to 3 TeV. CLIC would be built and operated in a staged approach with three centre-of-mass energy stages currently assumed to be 380 GeV, 1.5 TeV, and 3 TeV. This presentation provides a full overview of the CLIC Higgs physics potential in both the Higgsstrahlung (e+e- => ZH) and vector-boson fusion (e+e- => Hnunu) production modes at the three CLIC stages. The studies have been performed in full simulation. Latest results include Higgstrahlung at the highest energy, which is of particular interest as contributions from BSM effects to this process grow with energy. Ongoing studies of the Higgs branching ratio to photons at 3 TeV, as wells as ZZ* decay at various energies will also be included. The presentation includes latest results on the extraction of the Higgs self-coupling from double Higgs production at 1.5 TeV and 3 TeV. The Higgs self-coupling is of particular interest for determining the shape of the Higgs potential and for its sensitivity to a variety of BSM physics scenarios. At the higher-energy stages CLIC will produce Higgs boson pairs both via double Higgsstrahlung and via vector-boson fusion. Measurements of these processes lead to a determination of the Higgs self-coupling with a precision around 10%.
• Slides

-- LucieLinssen - 2021-05-10