The neutrino has no strong or electromagnetic interaction and feels only the weak force. That is why neutrinos are so elusive that they can pass through the entire earth without interacting. We know from past experience however, that this may not be the end of the road in our quest to understand what are the most basic building blocks of the world we see around us. To study the building blocks of matter, physicists collide accelerated particles. The particle accelerators work by manipulating the way charged particles feel electric and magnetic forces.
Electric forces accelerate particles.
Magnetic forces bend and focus them into a beam. There are laboratories with high energy accelerators in the U.S.A., Europe, Russia, Japan and China. The highest beam energy of both protons and antiprotons is presently 0.95 TeV and is achieved in the Tevatron at Fermilab near Chicago, where protons and antiprotons are accelerated and collided together. Using this record energy, Fermilab experimenters discovered the heaviest quark - the top quark. These lepton collisions are particularly suitable for the precise study of the weak force carriers Z and W .