Particle Physics

Runaway success and underfunding have led to growing pains for the preprint server

At long last, researchers have glimpsed ghostly particles produced by CERN’s Large Hadron Collider

Physicists have wondered if neutrino particles come in a mysterious fourth variety. Now new experimental findings complicate the question

A recent experiment has placed the best-yet limits on the strength of a long-sought fifth fundamental force

A mismatch between theory and experiment could explain big physics mysteries

The rare tetraquark is one of dozens of nonelementary particles discovered at the accelerator and could help test theories about the strong nuclear force

Originally built to speed up calculations, a machine-learning system is now making shocking progress at the frontiers of experimental quantum physics

Scientists achieved a record level of visual detail with an imaging technique that could help develop future electronics and better batteries

Circumstantial evidence could point to a mind-blowing solution to an antimatter mystery—or to the need for better space-based particle physics experiments

Two teams have demonstrated new degrees of quantum measurements in micron-sized metal drums

New radio-based observatories could soon detect ultrahigh-energy neutrinos, opening a new window on extreme cosmic physics

The discrepancy between the theoretical prediction and the experimentally determined value of the muon’s magnetic moment has become slightly stronger with a new result from Fermilab. But what does it mean?