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Consider the reaction ?+ ? ?+ + ? in which a pion decays into a neutrino...

Consider the reaction ?+ ? ?+ + ? in which a pion decays into a neutrino and an antimuon. If the pion is stationary before decay determine the kinetic energies of the neutrino and the antimuon. The rest energies of the pion and muon are 139.6 MeV and 105.7 MeV respectively. K? =???, K?+ =???

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