Color-Octet $ψ'$ Production at Low $p_\perp$

Details Color-Octet $ψ'$ Production at Low $p_\perp$ Color-Octet $ψ'$ Production at Low $p_\perp$

1995-06-20

arxiv.org/abs/hep-ph/9506378v1

Phys.Rev. D53 (1996) 4851-4856

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages

Scientific paper

10.1103/PhysRevD.53.4851

We study contributions from color-octet quarkonium formation mechanisms to $p_\perp$-integrated $\psi'$ production cross sections in pion-nucleon reactions. The observed polarization of the $\psi'$ is not reproduced by the lowest-order leading-twist color-singlet and color-octet mechanisms. This suggests that there are important quarkonium production mechanisms beyond leading twist.

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