The mechanisms of muon decay (9.4) and the semileptonic decay of the charmed quark (9.21a) are essentially
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The mechanisms of muon decay (9.4) and the semileptonic decay of the charmed quark (9.21a) are essentially the same. Use this to estimate the rate for the charmed quark decay, assuming that its mass is 1.5 ± 0.1GeV/c2 and the masses of final state particles may be neglected in both decays.
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