News Particle Physics

LHC reports pentaquark sightings

Collider offers new evidence for five-part particles

pentaquark

INSIDE A PENTAQUARK  Two particles discovered at the Large Hadron Collider are made up of five quarks: two up (u), one down (d), one charm (c) and one anticharm (c̅).

© CERN

By Andrew Grant

- More than 2 years ago

Quarks, the elementary units of matter found in every atomic nucleus, are surprisingly comfortable in large crowds.

Two particles discovered at the Large Hadron Collider, or LHC, near Geneva are each composed of five quarks, researchers report online July 13 at arXiv.org.