Tbilisi under the spell of Charm About 800 physicists from many parts of the world attended the 18th International Conference on High Energy Physics, one of the biennial Rochester Conferences, in July 1976 in Tbilisi, […]

Tales of colliders contained in 60 illustrious years of CERN Courier offer a rich perspective on the strategic decisions facing the field today.

Harald Fritzsch, who collaborated with Gell-Mann in the early 1970s, describes the steps that led to a full understanding of strong interactions.

The large amount of Run-2 data (collected in 2015–2018) allows the LHC experiments to probe previously unexplored rare processes, search for new physics and improve Standard Model measurements. The amount of data collected in Run […]

One of the most useful ways to understand the properties of the quark–gluon plasma (QGP) formed in relativistic heavy-ion collisions is to study how various probes interact when propagating though it. Heavier quarks, such as […]

Neutron stars consist of extremely dense nuclear matter. Their maximum size and mass are determined by their equation of state, which in turn depends on the interaction potentials between nucleons. Due to the high density, […]

New sources of CP violation (CPV) are needed to explain the absence of antimatter in our matter-dominated universe. The LHCb collaboration has reported new results describing CPV in B+ → π+K+K– and B+ → π+π+π– decays. Until very recently, […]

Through a beam dump darkly • Circular reasoning • Dø nabs Zc±(3900) • Strange neutron stars • Hawking’s maths vindicated • In pursuit of Majorana • The rarest decay • Got an axion to grind? • EDM search goes pear-shaped

A never-before-seen object with a cataclysmic past has been spotted in the constellation Cassiopeia, about 10,000 light years away. The star-like object has a temperature of 200,000 K, shines 40,000 times brighter than the Sun and […]

On 20 May, 144 years after the signing of the Metre Convention in 1875, the kilogram was given a new definition based on Planck’s constant, h. Long tied to the International Prototype of the Kilogram […]

In the heart of Beirut in a five-storey house owned by the Lebanese national telecommunication company, floors are about to be coated to make them anti-static, walls and ceilings will be insulated, and cabling systems […]

An event held at CERN on 20–21 May revealed 170 projects that have been granted €100,000 of European Union (EU) funding to develop disruptive detection and imaging technologies. The successful projects, drawn from more than […]

A team at Cornell University in the US has demonstrated that high-frequency superconducting radio-frequency (SRF) cavities made from niobium–tin alloy can be operated more efficiently than conventional niobium designs, representing a step towards smaller and […]

The open symposium of the European Strategy for Particle Physics (ESPP), which took place in Granada, Spain, from 13–16 May, revealed a vibrant field in flux as it grapples with how to attack the next […]

The Large Electron Positron collider (LEP) changed particle physics, and CERN, forever. Former Director-General Herwig Schopper describes what it took to make LEP happen.

Radiation: Fundamentals, Applications, Risks and Safety • From My Vast Repertoire …  Guido Altarelli’s Legacy • Signatures of the Artist

Completing the proton picture • Proton radius still puzzles • Adjusting cosmic-ray origins • The music of physics • Too much particle physics?

Two years since it was established, the CERN Alumni Network is proving a valuable careers resource, especially for young physicists who move out of academia, write Laure Esteveny and Rachel Bray.

The open symposium of the European Strategy for Particle Physics stimulated much lively discussion about the future of particle physics and the central role of CERN, writes Eckhard Elsen.

Olga Borisovna Igonkina 1973–2019 • Dieter Renker 1944–2019 • Anton Oed 1933–2018 • Jacques Soffer 1940–2019

Plenary talks during the opening of the open symposium of the European Strategy for Particle Physics highlighted the outstanding questions in the field, and the accelerator, detector and computing technologies necessary to tackle them.