Abstract
This paper presents the particle physics programme at CERN at the high-energy frontier. Starting from the key open questions in particle physics and the large-scale science facilities existing at CERN, concentrating on the Large Hadron Collider(LHC), this paper goes on to present future possibilities for global projects in high energy physics. The paper presents options for future colliders, all being within the framework of the recently updated European Strategy for Particle Physics, and all of which have a unique value to add to experimental particle physics. The paper concludes by outlining key messages for the way forward for high-energy physics research.
Highlights
Furthering our understanding of key questions in particle physics has relied on the interplay and synergy between various tools, such as accelerators, cosmic-ray detectors and reactors, and at various facilities, such as at a lepton collider, hadron collider and lepton-hadron collider, at both the energy frontier and the intensity frontier
The synergy has helped to elucidate the nature of electroweak symmetry breaking, the origin of mass and the discovery of the Higgs boson(s), which is a very central question in particle physics
The year saw the successful completion of the first LHC physics running period (Run I) and the start of the first Long Shutdown (LS1) to prepare the LHC machine, injectors and experiments for operation up to 14 Tera-electronvolt scale (TeV) centre-of-mass energy at the design luminosity and in view of the High Luminosity LHC (HLLHC)
Summary
Furthering our understanding of key questions in particle physics has relied on the interplay and synergy between various tools, such as accelerators, cosmic-ray detectors and reactors, and at various facilities, such as at a lepton collider, hadron collider and lepton-hadron collider, at both the energy frontier and the intensity frontier. The LHC is primarily a proton-proton collider designed to operate at an unprecedented centre-of-mass energy of 14 TeV and with a nominal luminosity of 1034 cm-2 s-1.
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