For a few years, one of particle physics’ most unsettling numbers seemed to be pointing somewhere strange. The trouble ...

The new calculation, made at the Large Hadron Collider (LHC) near Geneva, could help solve a niggling mystery about this ...

Measurement of W boson particle mass confirms Standard Model of physics and reignites the search for other particles.

When fundamental particles are heavier or lighter than expected, physicists' understanding of the universe can tip into the unknown. A particle that is just beyond its predicted mass can unravel ...

Wondering whether whether Dark Matter particles actually are produced inside a jet of standard model particles, led researchers to explore a new detector signature known as semi-visible jets, which ...