Physicists Hunt for Dark Forces

Tuesday - April 3, 2012

Photo - Jefferson Lab’s Free-Electron Laser

In tunnels beneath the Thomas Jefferson National Accelerator Facility in Newport News, Va., an accelerator whips a beam of electrons around a racetrack. Their energies are modest, but the beam is tightly packed with them — for it takes a very bright beam to detect a photon that doesn’t shine.

http://www.nature.com/news/physicists-hunt-for-dark-forces-1.10386