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Half a century ago, a series of tiny tracks in a bubble chamber at CERN changed the course of particle physics. The observation of “weak neutral currents”, announced on 19 July 1973 by Paul Musset of the Gargamelle collaboration, suggested that the electromagnetic and weak forces are facets of a more fundamental electroweak interaction that ruled in the early Universe. Exploring this new sector of nature has been a core business of CERN ever since, leading to the discovery of the W and Z bos...

The discovery of ‘weak neutral currents’ at Europe’s particle-physics research centre CERN 50 years ago was a decisive step towards establishing the standard model of particle physics — a journey that continues to this day. The discovery of weak neutral currents in particle-collision experiments.

When atomic nuclei such as gold or lead nuclei collide at high energy in particle colliders, they can produce quark–gluon plasma (QGP) – a hot and dense state of matter predicted to have existed shortly after the Big Bang. One of the key features of QGP formation in such heavy-ion collisions is a long-range spatial correspondence, or correlation, between the particles that are created in the collisions. This collective phenomenon, which manifests as a ridge-like shape in data plots and is kn...

On 3 March 2022, CERN Director-General Fabiola Gianotti and Brazilian Minister for Science, Technology and Innovation Marcos Pontes signed an agreement admitting Brazil as an Associate Member State of CERN.