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estimate the range of the weak nuclear interaction at low energies

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By considering the energy-time uncertainty principle, estimate the range of the weak nuclear interaction at low energies. Compare this range to the size of a typical nucleon (for example, a proton) and therefore explain why the weak nuclear interaction between individual nucleons is â??weakâ??. (Hint â?" the maximum speed of an interaction-carrying boson, like any particle, is the speed of light.)

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The expert estimates the range of the weak nuclear interaction at low energies.

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The mass of a W boson, the particle responsible for weak interactions, is 1.4 x 10^(-25) kg. At law energies the uncertainty in W boson's energy is on the order of its rest energy, DE ~ mc^2. On the other hand the energy-time uncertainty ...

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