CERN Courier Mar/Apr 2025
Welcome to the digital edition of the March/April 2025 issue of CERN Courier.
It’s remarkable that the estimated age of the universe could be revised downward by over half a billion years – a possibility that now looms for cosmologists. For particle physicists, the implications of a couple of parts per billion on the predicted magnetic moment of the muon are no less dramatic. These are the stakes in this edition of CERN Courier, which sheds light on two of the most intriguing anomalies in fundamental science: the “Hubble tension” (p28) and “muon g-2” (p21).
Both anomalies unite experimentalists and theorists in a race for precision. One spans the largest scales, and the other the smallest. One tests the ΛCDM model of cosmology, the other the Standard Model of particle physics. Both are currently the subjects of rapid global developments and both could have implications for new particles and interactions.
Elsewhere in the magazine: Ugo Amaldi remembers his father Edoardo’s foundational contributions to European cooperation in science (p33); KM3NeT smashes records for neutrino energy (p7); CERN accelerates superconductor technology (p8); CDF stands by the W-mass anomaly (p9); the relationship between particle physics and art (p41); upgrading triggers for the HL-LHC (p17); how to get a job in computer-game design (p48); and much more.