In the May 1966 issue of CERN Courier, A J Herz (Nuclear Physics Division) and W O Lock (Personnel Division) described the development of nuclear-emulsion detectors, highlighting a CERN experiment ...

Vacuum fluctuation The fine details of “hadronic vacuum polarisation” could be the difference between reinforcing the SM and challenging it. Credit: D Zemba, Pennsylvania State University. Fundamental ...

CERN Courier is essential reading for the global high-energy physics community. The website and associated print magazine highlight the latest developments in particle physics and related fields, ...

In a 2021 analysis of the same B + → J/ ψφ K + decay mode including LHC Run 2 data, LHCb reported two more neutral states, χ c1 (4685) and X(4630), that do not correspond to cc states expected from ...

Heavy breakthroughs. Double hidden charm A T c c c c (6600) candidate decays to a pair of J/ψ, which in turn decay into two pairs of muons (blue and red trajectories) in the CMS detector at CERN.

Threading the needle The LHCb experiment at CERN sparked a renaissance in charm physics with two intriguing measurements that challenge theorists to improve the precision of their predictions. Credit: ...

Accelerating into the future Seventy years after construction began on CERN’s still-operational Proton Synchrotron (above, left), a new generation of researchers is being called upon to help conceive ...

Accelerators on a chip Forty long and thin mesas increase in length from 100 to 500 μm on a silicon chip the size of a cent coin. Each mesa supports a micron-wide dual colonnade of silicon pillars ...

No trivial pursuit Six ultra-rare decays stand out for their potential to reveal new physics this decade. Credit: D Dominguez/CERN T hanks to its 13.6 TeV collisions, the LHC directly explores ...

Low-Earth orbit The Calorimetric Electron Telescope (extreme left), attached to the exposure facility of the Japanese Kibo module at the ISS. Credit: JAXA. In a series of daring balloon flights in ...

Misfits Massive neutrinos are not part of the Standard Model. Credit: Symmetry After all these years, neutrinos remain extraordinary – and somewhat deceptive. The experimental success of the ...

After 25 years of steady progress, recent advances in theory and computing are enabling researchers to connect an approach to quantum gravity called asymptotic safety to the Standard Model. Frank ...