Question

The Large Electron-Positron Collider (LEP) was an accelerator at CERN, the International particle physics laboratory in Europe. As its name implies, at LEP electrons (e^- with mass of 0.51 MeV/c2) were collided close to head-on with their anti-particle, positrons (e⁺ with the same mass). Each of these particles was accelerated to an energy of 104.5 GeV by the time they collided.

What is the Lorentz factor $\gamma$ of an electron at this energy?

How fast as a fraction of the speed of light are each of these particles moving when they collide?

What is the total energy in eV of the particles produced in this collision?

Assume that two identical mass particles are created in one such collision. Assume that their mass is so large that they could not have been produced if the collision energy were any smaller.

What is the mass in eV/c² of each of these two particles?

Answer 1

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