a proton with kinetic energy of 85 TeV collides with a stati

a proton with kinetic energy of 85 TeV collides with a stationary antiproton,causing them to annihilate each other. after the collision two particles of equal rest mass are produced. what is the rest mass?

Solution

Here, energy = 85 TeV= 1.362 * 10^-5 J

After the collision, two particles have equal rest mass.

       rest mass = (1.362 x10^-5)/(2 * 3 x 10⁸ * 3 x 10⁸) =   7.56 x10^-23 kg