The discovery and measurements of a Higgs boson

In July 2012, the ATLAS and CMS collaborations at CERN’s Large Hadron Collider announced thediscovery of a Higgs-like boson, a new heavy particle at a mass more than 130 times the mass ofa proton. Since then, further data have revealed its properties to be strikingly similar to those of theStandard Model Higgs boson, a particle expected from the mechanism introduced almost 50 yearsago by six theoreticians including British physicists Peter Higgs from Edinburgh University and TomKibble from Imperial College London. The discovery is the culmination of a truly remarkable scienticjourney and undoubtedly the most signicant scientic discovery of the twenty-rst century sofar. Its experimental conrmation turned out to be a monumental task requiring the creation ofan accelerator and experiments of unprecedented capability and complexity, designed to discern thesignatures that correspond to the Higgs boson. Thousands of scientists and engineers, in each ofthe ATLAS and CMS teams, came together from all four corners of the world to make this massivediscovery possible