A muon collider would enable the big jump ahead in energy reach that is needed for a
fruitful exploration of fundamental interactions. The challenges of producing muon collisions …

We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

The discovery of the Higgs boson in 2012, by the ATLAS and CMS experiments, was a
success achieved with only a percent of the entire dataset foreseen for the LHC. It opened a …

Our knowledge of the fundamental particles of nature and their interactions is summarized
by the standard model of particle physics. Advancing our understanding in this field has …

Combined measurements of the production and decay rates of the Higgs boson, as well as
its couplings to vector bosons and fermions, are presented. The analysis uses the LHC …

New physics has traditionally been expected in the high-p T region at high-energy collider
experiments. If new particles are light and weakly coupled, however, this focus may be …

In the past decade many charmonium-like states were observed experimentally. Especially
those charged charmonium-like Z c states and bottomonium-like Z b states cannot be …

Evidence for the light-by-light scattering process, γ γ→ γ γ, in ultraperipheral PbPb collisions
at a centre-of-mass energy per nucleon pair of 5.02 TeV is reported. The analysis is …

Jet substructure has emerged to play a central role at the Large Hadron Collider, where it
has provided numerous innovative ways to search for new physics and to probe the …

This report reviews the study of open heavy-flavour and quarkonium production in high-
energy hadronic collisions, as tools to investigate fundamental aspects of Quantum …