It is used in high energy particle physics and in accelerator laboratories.
Physicists hope that answers to these and other puzzles will emerge from the handful of accelerator laboratories working at the frontiers of physics.
Another type of particle, which survives briefly after creation in accelerator laboratories, is the meson: a particle containing just two quarks - a quark and an antiquark.
In addition, the Korea's only accelerator laboratory (PAL) is located nearby at POSTECH.
All except the top quark, the heaviest of all, have been recreated and identified by accelerator laboratories.
Full-scale experiments have begun at America's two largest accelerator laboratories, in California and Illinois, both of which recently completed machines even more powerful than European counterparts.
Among the major users of liquid helium for chilling superconductors are the huge accelerator laboratories studying nature's fundamental particles.
Dr. Robert Wilson, Fermilab's first director, was asked by members of Congress in 1970 whether the new accelerator laboratory would contribute to the development of military technology.
Oliphant soon fitted out a new accelerator laboratory with a 1.23 MeV generator at a cost of £6,000 while he designed an even larger 2 MeV generator.
Fifty senior scientists from the major US ICF programs and accelerator laboratories participated, with program heads and Nobel laureates also attending.