High-energy collisions between protons at the LHC routinely produce top quark–antiquark pairs (tt-bar). Measuring the probability, or cross section, of tt-bar production is both an important test of ...

As if atoms weren’t already mind-blowingly small, never mind subatomic particles, CERN researchers in the CMS Collaboration ...

Intriguing signs from CERN hint at a never-before-seen form of matter – one that could be the tiniest particle cluster ever detected. Top quarks, typically too short-lived to pair up, may have briefly ...

Scientists from CERN have discovered a signal that may indicate the existence of a new type of matter. The hypothetical ...