Open AccessColor-octetψ ′ p ⊥
Author(s) -
Wai-Keung Tang,
M. Vänttinen
Publication year - 1996
Publication title -
physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields
Language(s) - English
Resource type - Journals
eISSN - 1089-4918
pISSN - 0556-2821
DOI - 10.1103/physrevd.53.4851
Subject(s) - octet , quarkonium , physics , twist , particle physics , nucleon , quantum chromodynamics , quark , mathematics , geometry
We study contributions from color-octet quarkonium formation mechanisms to$p_\perp$-integrated $\psi'$ production cross sections in pion-nucleonreactions. The observed polarization of the $\psi'$ is not reproduced by thelowest-order leading-twist color-singlet and color-octet mechanisms. Thissuggests that there are important quarkonium production mechanisms beyondleading twist.Comment: 9 page
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