J/ψlongitudinal polarization fromπNinteractions

15 June 1987

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 58 (24) , 2523-2526
https://doi.org/10.1103/physrevlett.58.2523

Abstract

The spin alignment of 2.2×

10^{6}

J/ψ particles produced in 252-GeV πN interactions has been measured via their decay to

μ^{+}

μ^{-}

in an experiment at Fermilab. Whereas J/ψ’s are produced unpolarized over most of the kinematic range, they are found to become longitudinally polarized as

x_{F}

→1.

Keywords

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