Read article 'Mixed signals from X17'
Mixed signals from X17
A decade after the initial report of the ATOMKI anomaly, MEG II and PADME present conflicting findings on the proposed X17 boson.
Read article 'Mixed signals from X17'
Read article 'Closing the gap on axion-like particles'
Closing the gap on axion-like particles
The LHCb collaboration searched for axion-like particles decaying into photon pairs, setting bounds on their couplings in the low-mass region.
Read article 'High-energy physics meets in Marseille'
High-energy physics meets in Marseille
The 2025 European Physical Society Conference on High Energy Physics took place in Marseille from 7 to 11 July.
Read article 'Fermilab’s final word on muon g-2'
Fermilab’s final word on muon g-2
In parallel, theorists have published an updated Standard Model prediction based purely on lattice QCD.
Read article 'Planning for precision at Moriond'
Planning for precision at Moriond
Particle physics today benefits from a wealth of high-quality data at the same time as powerful new ideas are boosting the accuracy of theoretical predictions.
Read article 'Tau leptons from light resonances'
Tau leptons from light resonances
Among the fundamental particles, tau leptons occupy a curious spot.
Read article 'CMS observes top–antitop excess'
CMS observes top–antitop excess
The signal could be caused by a quasi-bound top–antitop meson commonly called "toponium".
Read article 'Do muons wobble faster than expected?'
Do muons wobble faster than expected?
With a new measurement imminent, the Courier explores the experimental results and theoretical calculations used to predict ‘muon g-2’ – one of particle physics’ most precisely known qu...
Read article 'The triggering of tomorrow'
The triggering of tomorrow
The third TDHEP workshop explored how triggers can cope with high data rates.
Read article 'Space oddities'
Space oddities
In his new popular book, Harry Cliff tackles the thorny subject of anomalies in fundamental science.
