A key theory of particle physics, the Standard Model has withstood test after test. But there are holes in the theory, particularly when it comes to gravity.

An experiment with a single electron, trapped for months on end, produced one of the most precise tests yet of the standard model of particle physics.

But recent results hinting at unexplained new physics beyond the standard model are of this second type. Detailed studies from the LHCb experiment found that a particle known as a beauty quark ...

An ultraprecise measurement of the mass of a subatomic particle called the W boson may diverge from the Standard Model, a long-reigning framework that governs the strange world of quantum physics.

A particle physicist explains just what this keystone theory includes. After 50 years, it’s the best we’ve got to answer what everything in the universe is made of and how it all holds together.

A new measurement of the W boson’s mass, made by smashing particles together, reveals a potential crack in physics’ standard model.

NPR's Ayesha Rascoe speaks to Esra Barlas Yücel, a researcher at University of Illinois at Urbana-Champaign, about Fermilab's most precise measurements of the muon particle's magnetic wobble.

At Fermilab, US physicists are refining their measurements of this subatomic particle—which has major implications for the Standard Model.

Measuring the g factor of a single electron bound to a tin nucleus provides a stringent test of the standard model of particle physics — and anything beyond it.

Higgs boson: 10 years after its discovery, why this particle could unlock new physics beyond the standard model ...

Nik Spencer/Nature At the Moriond particle-physics conference in La Thuile, Italy, in March, CMS researchers presented results of a search that found intriguing hints of a beyond-standard-model ...

Particle physics has always proceeded in two ways, of which new particles is one. The other is by making very precise measurements that test the predictions of theories and look for deviations ...