Separating K* from n* using In-Flight Decays to li 1 + v

A method is presented for completelydistinguishing between charged kaons and charged pions by using their charged muon (plusneutrino) decays(with neutrinos undetected) for meson laboratory momenta up to 1000 MeV/c. When either a charged kaon or a charged pion decaysinto a muon and a neutrino, momentum-energy (four-momentum) conservation will be used to provideunique "kinematic trajectories" for distinguishingkaon decays frompion decays when the change in three- momentum of the muon from that of either parent kaon or pion is measured (or simulated).In a magnetic field, observation of a trackedparticle showing a "kink" and/or a change in helicityindicates the decay of the parent particle into a similarly- charged muon product. Unique kinematic separation between each parent kaon and parent pion is possible for each parent particle'smomentum up to 1000 MeV/c. Curvature-radiusof the helical path in a magnetic field is used to determine each charged particle'smomentum, whetherit be a kaon, a pion or a muon. A weakfieldis adequateformaking this determination