CERN's LHC Enters Four-Year Shutdown for Major High-Luminosity Upgrade

CERN's Large Hadron Collider (LHC) has begun a four-year shutdown, known as Long Shutdown 3 (LS3), for a $1.5 billion hardware upgrade. This transformation will create the High-Luminosity LHC (HL-LHC), designed to increase collision rates tenfold. The upgrade aims to enable more precise studies of fundamental physics, including the Higgs boson, and to search for new physics beyond the Standard Model.