In a colliding beam storage ring an antiproton going east passesa proton going west, the distance of closest approach being . Thekinetic energy of each particle in the lab frame is 93GeV, corresponding to γ=100 . In the rest frame of theproton, what is the maximum intensity of the electric field at theproton due to the charge on the antiproton? For about how long,approximately, does the field exceed half its maximumintensity?
