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    • Keywords


      Pair Production; Secondary Particle; Decay Scheme; Nuclear Emulsion; Parent Particle

    • Abstract


      A K-meson is found to decay at rest into a nearly relativistic secondary particle. The secondary particle produces a nuclear disintegration in flight and is identified as a π-meson of kinetic energy ∼ 110 MeV. The event is interpreted as the decay of a θ±-meson according to the scheme:$$\theta ^ \pm \to \pi ^ \pm + \pi ^0 + (222 \pm 12 MeV.)$$

    • Author Affiliations


      M V K Appa Rao1 S Mitra1

      1. Tata Institute of Fundamental Research, Bombay 1
    • Dates


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