A bestiary of exotic hadrons
Patrick Koppenburg and Marco Pappagallo survey the 23 exotic hadrons discovered at the LHC so far.
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...
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.
The new particles
Fifty years ago, the discovery of the J/ψ and its excitations sparked the November Revolution in particle physics, giving fresh experimental impetus to the theoretical ideas that would become the Sta...
Voices from a new generation
Early-career researchers tell the Courier what they think is the key strategic issue for the future of high-energy physics.
Back to the future
A photographic journey linking CERN’s early years to ongoing research.
Watch out for hybrid pixels
Hybrid pixel detectors are changing the face of societal applications such as X-ray imaging.
Electroweak precision at the LHC
Geared for discovery more so than delicacy, the LHC is defying expectations by rivalling lepton colliders for precision.
Acceleration, but not as we know it
On-chip acceleration pioneers Robert Byer, Joel England, Peter Hommelhoff and Roy Shiloh report on progress to miniaturise accelerators from centimetres to microns.
Six rare decays at the energy frontier
Andrzej Buras explains how two rare kaon decays and four rare B-meson decays will soon probe for new physics beyond the reach of direct searches at colliders.