Single Polarisation Asymmetries for Quarkonia in Non-relativistic QCD

Details Single Polarisation Asymmetries for Quarkonia in Non-relativistic QCD Single Polarisation Asymmetries for Quarkonia in Non-relativistic QCD

1997-07-11

arxiv.org/abs/hep-ph/9707315v1

Phys.Rev. D57 (1998) 1858-1863

Physics

High Energy Physics

High Energy Physics - Phenomenology

Plain LaTeX with one figure (ps)

Scientific paper

10.1103/PhysRevD.57.1858

We find that single spin asymmetries in NRQCD are non-vanishing in general. They are proportional to the imaginary parts of some non-perturbative matrix elements. With statistics of about 10^6 identified J/psi's, or 10^5 identified chi_2, it is possible to measure these imaginary parts even if they are an order of magnitude smaller than the real parts. Such statistics are quite reasonable at polarised HERA N and other future experiments.

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