Since the discovery of high-energy extragalactic neutrinos by the IceCube collaboration in 2013, the hunt for the sources of such extreme cosmic events has been a major focus of neutrino astronomy. Now, in a multi-messenger […]

Dark energy and dark matter together make up about 95% of the universe, yet we do not know the origin, constituents, or dynamics (apart from gravity) of these substances. Various extensions of the Standard Model […]

Since the beginning of the LHC physics programme in 2010, the LHCb collaboration has been working to drive down the uncertainty on the least-precisely measured angle of the unitarity triangle, γ. The unitarity triangle exists […]

The ALICE collaboration has released a new measurement of the production of D0, D+, D*+ and Ds+ mesons, which contain a charm quark, in lead–lead (PbPb) collisions at a centre-of-mass energy per nucleon pair (√sNN) […]

New-Zealand company MARS Bioimaging Ltd has used technology developed at CERN to perform the first colour 3D X-ray of a human body, offering more accurate medical diagnoses. Father and son researchers Phil and Anthony Butler […]

A new experiment at Fermilab in the US, designed to make the most precise measurement of the muon’s magnetic moment, has completed its first physics data-taking campaign, showing promising results. Experiment E989 is a reincarnation […]

On 28 June, the US Department of Energy and the Italian Embassy, on behalf of the Italian Ministry of Education, Universities and Research, signed a collaboration agreement concerning the international Short Baseline Neutrino (SBN) programme […]

The Brout–Englert–Higgs mechanism solves the apparent theoretical impossibility of allowing weak vector bosons (the W and Z) to acquire mass. The discovery of the Higgs boson in 2012 via its decays into photons, Z and […]

During its closed session on 14 June, the CERN Council decided, by consensus, the venues and dates for two key meetings concerning the upcoming update of the European strategy for particle physics. An open symposium, […]

On 28 June, 200 servers from the CERN computing centre were donated to Kathmandu University (KU) in Nepal. The equipment, which is no longer needed by CERN, will contribute towards a new high-performance computing facility […]

Un neutrino détecté par IceCube nous aiguille sur l’origine des rayons cosmiques • Moment magnétique du muon : ça se précise • Les dates de la mise à jour de la stratégie ont été fixées • Première utilisation sur l’homme de l’imagerie 3D par rayons X en couleur • L’Italie et les États-Unis s’allient dans la quête des neutrinos stériles • Un geste pour stimuler l’informatique haute performance au Népal • ATLAS observe la désintégration du Higgs en quarks b • CMS s’aventure dans le noir • LHCb teste la cohérence interne du triangle de l’unitarité • Des mésons charmés pour mieux comprendre le plasma quarks-gluons • Le tricot sous toutes les coutures • La relativité réussit un test à l’échelle galactique

A ceremony at CERN on 15 June celebrated the start of civil-engineering works for the high-luminosity upgrade of the Large Hadron Collider (HL-LHC). The upgrade will allow about 10 times more data to be accumulated by […]

Muons have been accelerated by a radio-frequency accelerator for the first time, in an experiment performed at the Japan Proton Accelerator Research Complex (J-PARC) in Tokai, Japan. The work paves the way for a compact […]

On 2 May, the Thomas Jefferson National Accelerator Facility in Virginia, US, celebrated the completion of the 12 GeV CEBAF upgrade project. The $338 million upgrade has tripled CEBAF’s original operating energy and will allow, among other […]

A new facility called the Higgs Centre for Innovation opened at the Royal Observatory in Edinburgh on 25 May as part of the UK government’s efforts to boost productivity and innovation. The centre, named after Peter […]

On 28 May, the world’s largest and most sensitive detector for direct searches of dark matter in the form of weakly interacting massive particles (WIMPs) released its latest results. XENON1T, a 3D-imaging liquid-xenon time projection […]

CERN’s radioactive ion-beam facility ISOLDE has stamped a new coin in its impressive collection. Long considered the domain of high-energy, in-flight rare-isotope facilities, chromium has now been produced at ISOLDE in prodigious quantities, thanks to […]

Bottomonium mesons, composed of beauty quark–antiquark pairs bound to each other through the strong force, play a special role in our understanding of hadron formation because the large quark mass allows important simplifications in the […]

Last year, the LHCb collaboration announced the first observation of the Ξcc++ baryon, a doubly charmed particle (CERN Courier July/August 2017 p8). It was identified via the decay Ξcc++ → Λc+ K–π+π+, with the Λc+ baryon subsequently […]

One of the key goals in exploring the properties of QCD matter is to determine the minimum value of the shear viscosity to entropy density ratio (η/s) for an ideal fluid. In heavy-ion collisions at […]

Le CERN à l’aube d’un avenir lumineux • Accélération de muons au Japon • Le laboratoire Jefferson inaugure la version dernier cri du CEBAF • Un centre consacré au Higgs ouvre ses portes • WIMP: une étude sans précédent fixe de nouvelles limites • ISOLDE produit du chrome et sonde sa structure • CMS révèle la structure interne du bottomonium • Les baryons charmés se déchaînent • Mesurer les interactions du Higgs avec les fermions de troisième génération • Mesure de flux anisotropes dans les collisions Xe–Xe • Un composé chimique capable de bloquer les rhinovirus • Des trous noirs à foison au centre de la galaxie

Integrated luminosity On 28 April, 13 days ahead of schedule, operators at CERN’s Large Hadron Collider (LHC) successfully injected 1200 bunches of protons into the machine and brought them into collision – formally marking the beginning of […]

The large centre-of-mass energy and luminosity of the LHC have made possible the first measurements of electroweak-boson production in ultrarelativistic heavy-ion collisions. The production cross sections for such processes in proton–proton (pp) collisions are known with high precision, and indeed have