[Physics Briefing] Quarks observed to interact via minuscule “weak lightsabers”

Two among the rarest processes probed so far at the LHC, the scattering between W and Z bosons emitted by quarks in proton-proton collisions, have been established by the ATLAS experiment at CERN...

More: http://atlas.cern/updates/physics-briefing/weak-lightsabers