Color-Octet ${\psi }^{\prime }$ Production at Low $p_{\perp }$

Abstract

We study contributions from color-octet quarkonium formation mechanisms to $p_{\perp }$-integrated ${\psi }^{\prime }$ production cross sections in pion-nucleon reactions. The observed polarization of the ${\psi }^{\prime }$ 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.

9 pages

References in corpus (3)

• Color-octet quarkonia production
• Color-Octet Fragmentation and the psi' Surplus at the Tevatron
• Spin symmetry predictions for heavy quarkonia alignment

Cited by in corpus (29)

• Color-octet quarkonia production II
• NLO Production and Decay of Quarkonium
• Color-Octet Contributions to $J/\psi$ Photoproduction
• Production of Heavy Quarkonium in High Energy Colliders
• Hadro-production of Quarkonia in Fixed Target Experiments
• Inelastic photoproduction of polarised $J/\psi$
• Helicity Decomposition for Inclusive $J/\psi$ Production
• Systematics of quarkonium production
• Quarkonium Photoproduction at Next-to-leading Order
• Quarkonium momentum distributions in photoproduction and B decay
• Leptoproduction of J/psi
• Color-Octet $J/\psi$ Production at Low $p_{\perp }$
• Color-Octet $J/\psi$ Production in the ${\rm Y}$ Decay
• $J/\psi$ polarization in the CGC+NRQCD approach
• Color-Octet Contributions to J/psi Photoproduction via Fragmentation at HERA
• Production of J/psi Mesons in p Be Collisions at 530 and 800 GeV/c
• Hadronic $\psi$ production calculated in the NRQCD factorization formalism
• A note on the fate of the Landau-Yang theorem in non-Abelian gauge theories
• Experimental Review of Structures in the $J/\psi \varphi$ Mass Spectrum
• Quarkonium Production through Hard Comover Scattering
• The Soft Gluon Emission Process in the Color-Octet Model for Heavy Quarkonium Production
• Prompt Charmonium Production in Z Decays
• Deep inelastic $J/\psi$ production at HERA in the $k_T$-factorization approach and its consequences for the nonrelativistic QCD
• Signatures of Absorption Mechanisms for J/psi and psi' Production in High-Energy Heavy-Ion Collisions
• Associated J/psi + gamma Photoproduction as a Probe of the Colour-Octet Mechanism
• Color-octet mechanism and J/psi polarization at LEP
• Color-Octet Fraction in J/Psi Production and Absorption
• Polarized J/psi production from B mesons at the Tevatron
• Hard Processes with Spin-Dependent Parton Distributions