Physicists Discover a ‘Quarky’ Quintet
LHC experiment reveals exotic, short-lived particles with five quarks.
The world at scales smaller
than a proton is strange —
one might even say “quarky.”
Quarks are fundamental particles
that come in six flavors — yes, that’s
the official term — which also have
antimatter equivalents. They’re never
found alone, but nearly always in
pairs (called mesons) or trios (called
baryons), which include protons
and neutrons. Four-quark particles,
tetraquarks, have been observed only
in particle collider experiments.