Phys. Rev. 129, 1864–1866 (1963)Possible Determination of the Spin of the Ξ- from the Angular Asymmetry of Its DecayReceived 1 October 1962; published in the issue dated February 1963 The Ξ- hyperon is produced in a parity-conserving interaction involving only a proton and two spinless K mesons. Therefore, the Ξ- beam in any direction consists of an equal, incoherent mixture of two pure spin states which go into each other under 180° rotation in the production plane. This condition implies a new restriction upon the angular distribution of the Ξ- decay products. In particular, the distribution I(θ,φ)=1+Acosθ is impossible for A≠0 unless the Ξ- spin is ½. © 1963 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.129.1864
DOI:
10.1103/PhysRev.129.1864
PACS:
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