Measure the distance traveled by both neutral particles and calculate their speed from their momenta, and hence determine the lifetimes, both in the laboratory, and in their own rest-frames. Compare the latter with the accepted values [3]. Estimate the probability of finding a lifetime value equal or larger than the one you found.

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.