J/ψPolarization in 800-GeVp−CuInteractions

2003/07/31 by Tung‐Zong Chang, T. H. Chang, M. E. Beddo +38 · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevlett.91.211801

published as Phys.Rev.Lett.91:211801,2003 · 4 pages, 3 figures

arxiv created 2003/07/31 · openalex publication_date 2003/11/21 · arxiv updated 2009/12/01 · openalex created_date 2017/03/16 · openalex updated_date 2026/07/28

Abstract

We present measurements of the polarization of the J/psi produced in 800-GeV proton interactions with a copper target. Polarization of the J/psi is sensitive to the ccmacr; production and hadronization processes. A longitudinal polarization is observed at large x(F), while at small x(F) the state is produced essentially unpolarized or slightly transversely polarized. No significant variation of the polarization is observed versus p(T).

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• Measurement of Angular Distributions of Drell-Yan Dimuons inp+dInteractions at800 GeV/c