Color and Spin in Quarkonium Production

Abstract

I describe the NRQCD factorization approach to the inclusive production of heavy quarkonium, contrasting it with the color-singlet and color evaporation models. These approaches differ dramatically in their assumptions about the roles played by color and spin in the production process. They also differ dramatically in their predictions for the production of charmonium at large transverse momentum.

17 pages, LATEX with style file sprocl.sty

References in corpus (12)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Improved Nonrelativistic QCD for Heavy Quark Physics
• Color-Octet Fragmentation and the psi' Surplus at the Tevatron
• Gluon Fragmentation into Heavy Quarkonium
• Production of Heavy Quarkonium in High Energy Colliders
• Spin symmetry predictions for heavy quarkonia alignment
• Helicity Decomposition for Inclusive $J/\psi$ Production
• ${\psi }^{\prime }$ Polarization due to Color-Octet Quarkonia Production
• A Precise Determination of ${\alpha }_s$ from Lattice QCD
• Quarkonium Decay Matrix Elements from Quenched Lattice QCD
• A New Determination of M_b Using Lattice QCD
• ${\psi }^{\prime }$ Polarization as a test of colour octet quarkonium production

Cited by in corpus (1)

• Diffractive $J/\psi$ production through color-octet mechanism in resolved photon processes at HERA