J/ψ longitudinal polarization from πN interactions
Abstract
The spin alignment of 2.2×106 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 xF-->1.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 1987
- DOI:
- 10.1103/PhysRevLett.58.2523
- Bibcode:
- 1987PhRvL..58.2523B
- Keywords:
-
- 13.88.+e;
- 13.20.Gd;
- 13.85.Ni;
- Polarization in interactions and scattering;
- Decays of J/psi Upsilon and other quarkonia;
- Inclusive production with identified hadrons