Observations of millisecond pulsars by the NANOGrav collaboration show early signs of consistency with gravitational waves with a period of decades.
Willem de Boer was an enthusiastic all-round physicist.
Several outstanding particle physicists have been recognised by the 2021 spring awards of the APS.
Orlov was a world-renowned accelerator physicist and a campaigner for human rights.
Lambertson is best known for the injection/extraction magnet that bears his name.
The "eSPS" could drive new dark-sector searches and facilitate plasma wakefield R&D.
Work now turns to connecting such observations with the known suppression and regeneration mechanisms in heavy-ion collisions.
LHCb has probed hidden-valley scenarios which exhibit confinement in an analogous way to how the strong nuclear force confines quarks.
The tetraquark candidate could be a bound state of a charm-up diquark and its anti-diquark.
Oliver Brüning has taken over as project leader for the High-Luminosity LHC.