Question: Two factors that can determine the distance over which a force can act are the mass of the exchange particle that carries the force and

Two factors that can determine the distance over which a force can act are the mass of the exchange particle that carries the force and the Heisenberg uncertainty principle [Eq. (28-3)]. Assume that the uncertainty in the energy of an exchange particle is given by its rest energy and that the particle travels at nearly the speed of light. What is the range of the weak force carried by the Z particle that has a mass of 92 GeV/ c2? Compare this with the range of the weak force given in Table 30.3.

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