Quarkonium Polarization in Non-relativistic QCD and the Quark-Gluon Plasma

Abstract

We examine angular distributions of leptons arising from the decay of J/psi in inclusive hadroproduction. Taking into account feed-down contributions from chi_{1,2}, a flat distribution emerges without fine tuning parameters. Changes in the ratio of direct to total J/psi cross sections would change this distribution significantly. Such angular distributions are, therefore, confirmatory tests of the J/psi suppression signal for the production of a quark-gluon plasma. Related effects are predicted for the Upsilon.

20 pages including 3 eps figures, LaTeX source

References in corpus (4)

• NLO Production and Decay of Quarkonium
• Chi_1 and Polarisation Asymmetries for Quarkonia at High Orders in Non-relativistic QCD
• Color-octet mechanism and J/psi polarization at LEP
• Higher Orders in the Colour-Octet Model of J/ψProduction

Cited by in corpus (5)

• Sequential charmonium dissociation
• Quarkonium Physics at a Fixed-Target Experiment using the LHC Beams
• Quarkonium polarization in heavy ion collisions as a possible signature of the quark--gluon plasma
• Prospects for quarkonium studies at the high-luminosity LHC
• Color Octet Contribution to J/psi Photoproduction Asymmetries