Irodov Solutions → Atomic and Nuclear Physics → Elementary Particles

6.291. Calculate the kinetic energies of protons whose momenta are 0.10, 1.0, and 10 GeV/c, where c is the velocity of light.
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6.308. Which of the following processes are forbidden by the law of conservation of lepton charge:
(1) n → p + e^- + ν;
(2) π⁺ → μ⁺ + e^- + e⁺;
(3) π^- → μ^- + ν;
(4) p + e^- → n + ν;
(5) μ⁺ → e⁺ + ν + ν;
(6) K^- → μ^- + ν?
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