From lightning to the death of electrons, the highest-energy form of light is everywhere.
photon
CMS looks for evidence of J/ψ mesons in near-collision events in the LHC’s 2011 heavy-ion run, during which lead nuclei were accelerated to an unprecedented energy of 574 trillion electronvolts.
Light is all around us, but how much do you really know about the photons speeding past you?
To learn more about the particles they collide, physicists turn their attention to a less destructive type of collision in the LHC.