Read article 'The Hubble tension'
The Hubble tension
Vivian Poulin asks if the tension between a direct measurement of the Hubble constant and constraints from the early universe could be resolved by new physics.
Read article 'The Hubble tension'
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 'Edoardo Amaldi and the birth of Big Science'
Edoardo Amaldi and the birth of Big Science
In an interview drawing on memories from childhood and throughout his own distinguished career at CERN, Ugo Amaldi offers deeply personal insights into his father Edoardo’s foundational contribution...
Read article 'How to unfold with AI'
How to unfold with AI
Inspired by high-dimensional data and the ideals of open science, high-energy physicists are using artificial intelligence to reimagine the statistical technique of ‘unfolding’.
Read article 'CERN and ESA: a decade of innovation'
CERN and ESA: a decade of innovation
Enrico Chesta, Véronique Ferlet-Cavrois and Markus Brugger highlight seven ways CERN and ESA are working together to further fundamental exploration and innovation in space technologies.
Read article 'The other 99%'
The other 99%
Daniel Tapia Takaki describes how ultraperipheral collisions mediated by high-energy photons are shedding light on gluon saturation, gluonic hotspots and nuclear shadowing.
Read article 'Charm and synthesis'
Charm and synthesis
Sheldon Glashow recalls the events surrounding a remarkable decade of model building and discovery between 1964 and 1974.
Read article 'A bestiary of exotic hadrons'
A bestiary of exotic hadrons
Patrick Koppenburg and Marco Pappagallo survey the 23 exotic hadrons discovered at the LHC so far.
Read article 'Inside pentaquarks and tetraquarks'
Inside pentaquarks and tetraquarks
Marek Karliner and Jonathan Rosner ask what makes tetraquarks and pentaquarks tick, revealing them to be at times exotic compact states, at times hadronic molecules and at times both – with much sti...
Read article 'Charming clues for existence'
Charming clues for existence
Alexander Lenz argues that the charm quark is an experimental and theoretical enigma that has the potential to shed light on the matter–antimatter asymmetry in the universe.
