APS » PROLA » Phys. Rev. Lett. » Volume 91 » Issue 21

Phys. Rev. Lett. 91, 211801 (2003) [4 pages]

J/ψ Polarization in 800-GeV p-Cu Interactions
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T. H. Chang et al. FNAL E866/NuSea Collaboration
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Received 30 July 2003; published 21 November 2003

We present measurements of the polarization of the J/ψ produced in 800-GeV proton interactions with a copper target. Polarization of the J/ψ is sensitive to the cc̅ production and hadronization processes. A longitudinal polarization is observed at large xF, while at small xF the state is produced essentially unpolarized or slightly transversely polarized. No significant variation of the polarization is observed versus pT.


©2003 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v91/e211801
DOI: 10.1103/PhysRevLett.91.211801
PACS: 13.85.Ni, 13.88.+e, 14.40.Nd

* Present address: University of Illinois, Urbana, IL 61801, USA.
† Present address: University of Cincinnati, Cincinnati, OH 45221, USA.
‡ Present address: Florida State University, Tallahassee, FL 32306, USA.
§ On leave from Kurchatov Institute, Moscow, Russia.
** Present address: Indiana University, Bloomington, IN 61801, USA.

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