Chi_1 and Polarisation Asymmetries for Quarkonia at High Orders in Non-relativistic QCD

Details Chi_1 and Polarisation Asymmetries for Quarkonia at High Orders in Non-relativistic QCD Chi_1 and Polarisation Asymmetries for Quarkonia at High Orders in Non-relativistic QCD

1997-06-30

arxiv.org/abs/hep-ph/9706541v1

Phys.Rev. D56 (1997) 7341-7349

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages LaTeX including 2 figures

Scientific paper

10.1103/PhysRevD.56.7341

We study doubly polarised asymmetries of c-cbar and b-bbar mesons in hadro- and photo-production at low transverse momentum in non-relativistic QCD to high orders in the relative velocity of the pair, v. We give the complete set of expressions required for the asymmetries up to order v^9. The asymmetries in the production of eta_{c,b} states are a stable measure of the polarised gluon densities. The asymmetries for chi_{c,b}, J/psi, psi', and the various Upsilon states are stringent tests of the NRQCD scaling relations.

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